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Rainfall : Irregular ; several years of drought are often followed by a single year of abundant rainfall .
TQA:T_1001_3
10
followed
true
follow
[ "what", "is", "something", "followed", "_", "by", "_", "?" ]
[ "rainfall", "a single year of abundant rainfall" ]
[ [ 17, 18 ], [ 12, 18 ] ]
Rainfall : Irregular ; several years of drought are often followed by a single year of abundant rainfall .
TQA:T_1001_3
10
followed
true
follow
[ "when", "is", "something", "followed", "_", "by", "something", "?" ]
[ "often" ]
[ [ 9, 10 ] ]
Dry climates cover about 26 % of the worlds land area .
TQA:T_1001_4
1
climates
true
climate
[ "what", "_", "_", "climates", "_", "_", "_", "?" ]
[ "Dry" ]
[ [ 0, 1 ] ]
Low latitude deserts are found at the Ferrell cell high pressure zone .
TQA:T_1001_5
4
found
true
find
[ "what", "is", "_", "found", "_", "_", "_", "?" ]
[ "Low latitude deserts" ]
[ [ 0, 3 ] ]
Low latitude deserts are found at the Ferrell cell high pressure zone .
TQA:T_1001_5
4
found
true
find
[ "where", "is", "something", "found", "_", "_", "_", "?" ]
[ "the Ferrell cell high pressure zone", "at the Ferrell cell high pressure zone" ]
[ [ 6, 12 ], [ 5, 12 ] ]
Higher latitude deserts occur within continents or in rainshadows .
TQA:T_1001_6
3
occur
true
occur
[ "what", "_", "_", "occurred", "_", "_", "_", "?" ]
[ "Higher latitude", "Higher latitude deserts" ]
[ [ 0, 2 ], [ 0, 3 ] ]
Higher latitude deserts occur within continents or in rainshadows .
TQA:T_1001_6
3
occur
true
occur
[ "where", "did", "something", "occur", "_", "_", "_", "?" ]
[ "within continents or in rainshadows" ]
[ [ 4, 9 ] ]
Vegetation is sparse but well adapted to the dry conditions .
TQA:T_1001_7
5
adapted
true
adapt
[ "what", "is", "_", "adapted", "_", "_", "_", "?" ]
[ "Vegetation" ]
[ [ 0, 1 ] ]
Vegetation is sparse but well adapted to the dry conditions .
TQA:T_1001_7
5
adapted
true
adapt
[ "what", "is", "something", "adapted", "_", "to", "_", "?" ]
[ "the dry conditions" ]
[ [ 7, 10 ] ]
Moist subtropical mid-latitude climates are found along the coastal areas in the United States .
TQA:T_1002_0
5
found
true
find
[ "what", "is", "_", "found", "_", "_", "somewhere", "?" ]
[ "Moist subtropical mid-latitude climates", "subtropical mid-latitude climates" ]
[ [ 0, 4 ], [ 1, 4 ] ]
Moist subtropical mid-latitude climates are found along the coastal areas in the United States .
TQA:T_1002_0
5
found
true
find
[ "where", "is", "something", "found", "_", "_", "_", "?" ]
[ "along the coastal areas in the United States" ]
[ [ 6, 14 ] ]
Continental climates are found in most of the North American interior from about 40 N to 70 N. Temperature : The average temperature of the warmest month is higher than 10 C -LRB- 50 F -RRB- and the coldest month is below -3 C -LRB- 27 F -RRB- .
TQA:T_1003_0
3
found
true
find
[ "what", "is", "_", "found", "_", "_", "_", "?" ]
[ "Continental climates" ]
[ [ 0, 2 ] ]
Continental climates are found in most of the North American interior from about 40 N to 70 N. Temperature : The average temperature of the warmest month is higher than 10 C -LRB- 50 F -RRB- and the coldest month is below -3 C -LRB- 27 F -RRB- .
TQA:T_1003_0
3
found
true
find
[ "where", "is", "something", "found", "_", "_", "_", "?" ]
[ "in most of the North American interior", "in most of the North American interior from about 40 N to 70 N.", "most of the North American interior from about 40 N to 70 N." ]
[ [ 4, 11 ], [ 4, 18 ], [ 5, 18 ] ]
Precipitation : Winters are cold and stormy -LRB- look at the latitude of this zone and see if you can figure out why -RRB- .
TQA:T_1003_1
16
see
true
see
[ "where", "might", "someone", "see", "something", "_", "_", "?" ]
[ "at the latitude of this zone" ]
[ [ 9, 15 ] ]
Precipitation : Winters are cold and stormy -LRB- look at the latitude of this zone and see if you can figure out why -RRB- .
TQA:T_1003_1
16
see
true
see
[ "who", "might", "_", "see", "something", "_", "_", "?" ]
[ "you" ]
[ [ 18, 19 ] ]
Precipitation : Winters are cold and stormy -LRB- look at the latitude of this zone and see if you can figure out why -RRB- .
TQA:T_1003_1
20
figure
true
figure
[ "what", "can", "_", "figured", "_", "out", "_", "?" ]
[ "Winters", "why" ]
[ [ 2, 3 ], [ 22, 23 ] ]
Precipitation : Winters are cold and stormy -LRB- look at the latitude of this zone and see if you can figure out why -RRB- .
TQA:T_1003_1
20
figure
true
figure
[ "who", "can", "_", "figure", "something", "out", "_", "?" ]
[ "you", "why" ]
[ [ 18, 19 ], [ 22, 23 ] ]
Trees grow in continental climates , even though winters are extremely cold , because the average annual temperature is fairly mild .
TQA:T_1003_3
1
grow
true
grow
[ "what", "_", "_", "grows", "_", "_", "_", "?" ]
[ "Trees" ]
[ [ 0, 1 ] ]
Trees grow in continental climates , even though winters are extremely cold , because the average annual temperature is fairly mild .
TQA:T_1003_3
1
grow
true
grow
[ "where", "does", "something", "grow", "_", "_", "_", "?" ]
[ "in continental climates" ]
[ [ 2, 5 ] ]
Trees grow in continental climates , even though winters are extremely cold , because the average annual temperature is fairly mild .
TQA:T_1003_3
1
grow
true
grow
[ "why", "does", "something", "grow", "_", "_", "somewhere", "?" ]
[ "because the average annual temperature is fairly mild" ]
[ [ 13, 21 ] ]
Continental climates are not found in the Southern Hemisphere because of the absence of a continent large enough to generate this effect .
TQA:T_1003_4
4
found
true
find
[ "what", "isn't", "_", "found", "_", "_", "somewhere", "?" ]
[ "Continental climates" ]
[ [ 0, 2 ] ]
Continental climates are not found in the Southern Hemisphere because of the absence of a continent large enough to generate this effect .
TQA:T_1003_4
4
found
true
find
[ "where", "isn't", "something", "found", "_", "_", "_", "?" ]
[ "in the Southern Hemisphere" ]
[ [ 5, 9 ] ]
Continental climates are not found in the Southern Hemisphere because of the absence of a continent large enough to generate this effect .
TQA:T_1003_4
4
found
true
find
[ "why", "isn't", "something", "found", "_", "_", "somewhere", "?" ]
[ "because of the absence of a continent large enough to generate this effect" ]
[ [ 9, 22 ] ]
Continental climates are not found in the Southern Hemisphere because of the absence of a continent large enough to generate this effect .
TQA:T_1003_4
19
generate
true
generate
[ "how", "can", "someone", "generated", "_", "_", "somewhere", "?" ]
[ "Continental climates are not found in the Southern Hemisphere because of the absence of a continent large enough to generate", "because of the absence of a continent large enough" ]
[ [ 0, 20 ], [ 9, 18 ] ]
Polar climates are found across the continents that border the Arctic Ocean , Greenland , and Antarctica .
TQA:T_1004_0
3
found
true
find
[ "what", "is", "_", "found", "_", "_", "somewhere", "?" ]
[ "Polar climates" ]
[ [ 0, 2 ] ]
Polar climates are found across the continents that border the Arctic Ocean , Greenland , and Antarctica .
TQA:T_1004_0
3
found
true
find
[ "where", "is", "something", "found", "_", "_", "_", "?" ]
[ "across the continents that border the Arctic Ocean , Greenland , and Antarctica", "across the continents" ]
[ [ 4, 17 ], [ 4, 7 ] ]
Polar climates are found across the continents that border the Arctic Ocean , Greenland , and Antarctica .
TQA:T_1004_0
8
border
true
border
[ "what", "is", "_", "bordering", "something", "_", "_", "?" ]
[ "Polar climates", "the continents" ]
[ [ 0, 2 ], [ 5, 7 ] ]
Polar climates are found across the continents that border the Arctic Ocean , Greenland , and Antarctica .
TQA:T_1004_0
8
border
true
border
[ "where", "is", "something", "bordering", "something", "_", "_", "?" ]
[ "the Arctic Ocean , Greenland , and Antarctica", "the Arctic Ocean , Greenland , and Antarctica ." ]
[ [ 9, 17 ], [ 9, 18 ] ]
Precipitation : The region is dry , with less than 25 cm -LRB- 10 inches -RRB- of precipitation annually ; most precipitation occurs during the summer .
TQA:T_1004_5
22
occurs
true
occur
[ "what", "_", "_", "occurs", "_", "_", "_", "?" ]
[ "most precipitation", "precipitation" ]
[ [ 20, 22 ], [ 21, 22 ] ]
Precipitation : The region is dry , with less than 25 cm -LRB- 10 inches -RRB- of precipitation annually ; most precipitation occurs during the summer .
TQA:T_1004_5
22
occurs
true
occur
[ "when", "does", "something", "occur", "_", "_", "_", "?" ]
[ "during the summer" ]
[ [ 23, 26 ] ]
Precipitation : The region is dry , with less than 25 cm -LRB- 10 inches -RRB- of precipitation annually ; most precipitation occurs during the summer .
TQA:T_1004_5
22
occurs
true
occur
[ "where", "does", "something", "occur", "_", "_", "_", "?" ]
[ "The region" ]
[ [ 2, 4 ] ]
When climate conditions in a small area are different from those of the surroundings , the climate of the small area is called a microclimate .
TQA:T_1005_0
22
called
true
call
[ "what", "is", "_", "called", "something", "_", "_", "?" ]
[ "the climate of the small area", "a microclimate" ]
[ [ 15, 21 ], [ 23, 25 ] ]
When climate conditions in a small area are different from those of the surroundings , the climate of the small area is called a microclimate .
TQA:T_1005_0
22
called
true
call
[ "what", "is", "something", "called", "_", "_", "_", "?" ]
[ "the climate of the small area", "a microclimate" ]
[ [ 15, 21 ], [ 23, 25 ] ]
The microclimate of a valley may be cool relative to its surroundings since cold air sinks .
TQA:T_1005_1
15
sinks
true
sink
[ "what", "_", "_", "sinks", "_", "_", "_", "?" ]
[ "cold air" ]
[ [ 13, 15 ] ]
The ground surface may be hotter or colder than the air a few feet above it , because rock and soil gain and lose heat readily .
TQA:T_1005_2
23
lose
true
lose
[ "how", "does", "something", "lose", "something", "_", "_", "?" ]
[ "readily" ]
[ [ 25, 26 ] ]
The ground surface may be hotter or colder than the air a few feet above it , because rock and soil gain and lose heat readily .
TQA:T_1005_2
23
lose
true
lose
[ "what", "does", "something", "lose", "_", "_", "_", "?" ]
[ "heat" ]
[ [ 24, 25 ] ]
The ground surface may be hotter or colder than the air a few feet above it , because rock and soil gain and lose heat readily .
TQA:T_1005_2
23
lose
true
lose
[ "what", "_", "_", "loses", "something", "_", "_", "?" ]
[ "rock and soil" ]
[ [ 18, 21 ] ]
In the Northern Hemisphere , a south-facing slope receives more solar energy than a north-facing slope , so each side supports different amounts and types of vegetation .
TQA:T_1005_4
8
receives
true
receive
[ "what", "does", "something", "receive", "_", "_", "_", "?" ]
[ "more solar energy than a north-facing slope", "more solar energy" ]
[ [ 9, 16 ], [ 9, 12 ] ]
In the Northern Hemisphere , a south-facing slope receives more solar energy than a north-facing slope , so each side supports different amounts and types of vegetation .
TQA:T_1005_4
8
receives
true
receive
[ "what", "_", "_", "receives", "something", "_", "_", "?" ]
[ "a south-facing slope" ]
[ [ 5, 8 ] ]
In the Northern Hemisphere , a south-facing slope receives more solar energy than a north-facing slope , so each side supports different amounts and types of vegetation .
TQA:T_1005_4
20
supports
true
support
[ "what", "is", "_", "supported", "_", "_", "_", "?" ]
[ "different amounts and types of vegetation" ]
[ [ 21, 27 ] ]
In the Northern Hemisphere , a south-facing slope receives more solar energy than a north-facing slope , so each side supports different amounts and types of vegetation .
TQA:T_1005_4
20
supports
true
support
[ "where", "is", "something", "supported", "_", "_", "_", "?" ]
[ "Northern Hemisphere", "In the Northern Hemisphere" ]
[ [ 2, 4 ], [ 0, 4 ] ]
In the Northern Hemisphere , a south-facing slope receives more solar energy than a north-facing slope , so each side supports different amounts and types of vegetation .
TQA:T_1005_4
20
supports
true
support
[ "who", "_", "_", "supports", "something", "_", "_", "?" ]
[ "each side" ]
[ [ 18, 20 ] ]
Climates and biomes typical of higher latitudes may be found in other areas of the world at high altitudes .
TQA:T_1005_6
9
found
true
find
[ "what", "is", "_", "found", "_", "_", "_", "?" ]
[ "Climates and biomes typical of higher latitudes", "Climates and biomes", "higher latitudes" ]
[ [ 0, 7 ], [ 0, 3 ], [ 5, 7 ] ]
Climates and biomes typical of higher latitudes may be found in other areas of the world at high altitudes .
TQA:T_1005_6
9
found
true
find
[ "where", "is", "something", "found", "_", "_", "_", "?" ]
[ "other areas of the world at high altitudes", "in other areas of the world" ]
[ [ 11, 19 ], [ 10, 16 ] ]
Click image to the left or use the URL below .
TQA:T_1005_7
0
Click
true
click
[ "what", "should", "_", "clicked", "_", "_", "_", "?" ]
[ "image" ]
[ [ 1, 2 ] ]
Click image to the left or use the URL below .
TQA:T_1005_7
0
Click
true
click
[ "where", "should", "something", "clicked", "_", "_", "_", "?" ]
[ "to the left" ]
[ [ 2, 5 ] ]
Click image to the left or use the URL below .
TQA:T_1005_7
6
use
true
use
[ "what", "should", "_", "used", "_", "_", "_", "?" ]
[ "the URL", "the URL below" ]
[ [ 7, 9 ], [ 7, 10 ] ]
Click image to the left or use the URL below .
TQA:T_1005_7
6
use
true
use
[ "where", "should", "something", "used", "_", "_", "_", "?" ]
[ "below" ]
[ [ 9, 10 ] ]
Coal , a solid fossil fuel formed from the partially decomposed remains of ancient forests , is burned primarily to produce electricity .
TQA:T_1012_0
6
formed
true
form
[ "how", "is", "something", "formed", "_", "_", "_", "?" ]
[ "from the partially decomposed remains of ancient forests", "partially decomposed remains" ]
[ [ 7, 15 ], [ 9, 12 ] ]
Coal , a solid fossil fuel formed from the partially decomposed remains of ancient forests , is burned primarily to produce electricity .
TQA:T_1012_0
6
formed
true
form
[ "what", "_", "_", "formed", "something", "_", "_", "?" ]
[ "Coal", "ancient forests" ]
[ [ 0, 1 ], [ 13, 15 ] ]
Coal , a solid fossil fuel formed from the partially decomposed remains of ancient forests , is burned primarily to produce electricity .
TQA:T_1012_0
10
decomposed
true
decompose
[ "how long", "was", "something", "decomposed", "_", "_", "_", "?" ]
[ "partially" ]
[ [ 9, 10 ] ]
Coal , a solid fossil fuel formed from the partially decomposed remains of ancient forests , is burned primarily to produce electricity .
TQA:T_1012_0
10
decomposed
true
decompose
[ "what", "was", "_", "decomposed", "_", "_", "_", "?" ]
[ "Coal", "remains of ancient forests", "remains" ]
[ [ 0, 1 ], [ 11, 15 ], [ 11, 12 ] ]
Coal , a solid fossil fuel formed from the partially decomposed remains of ancient forests , is burned primarily to produce electricity .
TQA:T_1012_0
17
burned
true
burn
[ "what", "is", "_", "burned", "_", "_", "_", "?" ]
[ "Coal", "a solid fossil fuel formed from the partially decomposed remains of ancient forests" ]
[ [ 0, 1 ], [ 2, 15 ] ]
Coal , a solid fossil fuel formed from the partially decomposed remains of ancient forests , is burned primarily to produce electricity .
TQA:T_1012_0
17
burned
true
burn
[ "why", "is", "something", "burned", "_", "_", "_", "?" ]
[ "primarily to produce electricity", "to produce electricity" ]
[ [ 18, 22 ], [ 19, 22 ] ]
Coal , a solid fossil fuel formed from the partially decomposed remains of ancient forests , is burned primarily to produce electricity .
TQA:T_1012_0
20
produce
true
produce
[ "how", "is", "something", "produced", "_", "_", "_", "?" ]
[ "Coal , a solid fossil fuel formed from the partially decomposed remains of ancient forests , is burned", "burned" ]
[ [ 0, 18 ], [ 17, 18 ] ]
Coal , a solid fossil fuel formed from the partially decomposed remains of ancient forests , is burned primarily to produce electricity .
TQA:T_1012_0
20
produce
true
produce
[ "what", "is", "_", "produced", "_", "_", "_", "?" ]
[ "electricity" ]
[ [ 21, 22 ] ]
Coal use is undergoing enormous growth as the availability of oil and natural gas decreases and cost increases .
TQA:T_1012_1
3
undergoing
true
undergo
[ "what", "is", "something", "undergoing", "_", "_", "_", "?" ]
[ "enormous growth" ]
[ [ 4, 6 ] ]
Coal use is undergoing enormous growth as the availability of oil and natural gas decreases and cost increases .
TQA:T_1012_1
3
undergoing
true
undergo
[ "what", "is", "_", "undergoing", "something", "_", "_", "?" ]
[ "Coal", "Coal use" ]
[ [ 0, 1 ], [ 0, 2 ] ]
This increase in coal use is happening particularly in developing nations , such as China , where coal is cheap and plentiful .
TQA:T_1012_2
6
happening
true
happen
[ "where", "is", "something", "happening", "_", "_", "_", "?" ]
[ "particularly in developing nations , such as China", "particularly in developing nations , such as China , where coal is cheap and plentiful", "in developing nations , such as China" ]
[ [ 7, 15 ], [ 7, 22 ], [ 8, 15 ] ]
This increase in coal use is happening particularly in developing nations , such as China , where coal is cheap and plentiful .
TQA:T_1012_2
9
developing
true
develop
[ "what", "is", "_", "developing", "_", "_", "_", "?" ]
[ "nations", "This increase in coal use" ]
[ [ 10, 11 ], [ 0, 5 ] ]
The most common form of coal is bituminous , a sedimentary rock that contains impurities such as sulfur -LRB- Figure 1.1 -RRB- .
TQA:T_1012_4
13
contains
true
contain
[ "what", "_", "_", "contains", "something", "_", "_", "?" ]
[ "rock", "sedimentary rock" ]
[ [ 11, 12 ], [ 10, 12 ] ]
The most common form of coal is bituminous , a sedimentary rock that contains impurities such as sulfur -LRB- Figure 1.1 -RRB- .
TQA:T_1012_4
13
contains
true
contain
[ "what", "does", "something", "contain", "_", "_", "_", "?" ]
[ "impurities such as sulfur", "impurities" ]
[ [ 14, 18 ], [ 14, 15 ] ]
Anthracite coal has been metamorphosed and is nearly all carbon .
TQA:T_1012_5
4
metamorphosed
true
metamorphose
[ "what", "has", "_", "metamorphosed", "_", "_", "_", "?" ]
[ "Anthracite coal" ]
[ [ 0, 2 ] ]
Coal forms from dead plants that settled at the bottom of ancient swamps .
TQA:T_1013_0
6
settled
true
settle
[ "what", "_", "_", "settled", "_", "_", "somewhere", "?" ]
[ "dead plants" ]
[ [ 3, 5 ] ]
Coal forms from dead plants that settled at the bottom of ancient swamps .
TQA:T_1013_0
6
settled
true
settle
[ "where", "did", "something", "settle", "_", "_", "_", "?" ]
[ "the bottom of ancient swamps", "at the bottom of ancient swamps" ]
[ [ 8, 13 ], [ 7, 13 ] ]
Lush coal swamps were common in the tropics during the Carboniferous period , which took place more than 300 million years ago -LRB- Figure 1.2 -RRB- .
TQA:T_1013_1
14
took
true
take
[ "what", "did", "something", "take", "_", "_", "_", "?" ]
[ "place" ]
[ [ 15, 16 ] ]
Lush coal swamps were common in the tropics during the Carboniferous period , which took place more than 300 million years ago -LRB- Figure 1.2 -RRB- .
TQA:T_1013_1
14
took
true
take
[ "what", "_", "_", "took", "something", "_", "somewhere", "?" ]
[ "the Carboniferous period" ]
[ [ 9, 12 ] ]
Lush coal swamps were common in the tropics during the Carboniferous period , which took place more than 300 million years ago -LRB- Figure 1.2 -RRB- .
TQA:T_1013_1
14
took
true
take
[ "when", "did", "something", "take", "something", "_", "_", "?" ]
[ "more than 300 million years ago" ]
[ [ 16, 22 ] ]
Mud and other dead plants buried the organic material in the swamp , and burial kept oxygen away .
TQA:T_1013_3
5
buried
true
bury
[ "what", "_", "_", "buried", "something", "_", "_", "?" ]
[ "Mud", "other dead plants", "Mud and other dead plants" ]
[ [ 0, 1 ], [ 2, 5 ], [ 0, 5 ] ]
Mud and other dead plants buried the organic material in the swamp , and burial kept oxygen away .
TQA:T_1013_3
5
buried
true
bury
[ "what", "did", "something", "bury", "_", "_", "_", "?" ]
[ "the organic material" ]
[ [ 6, 9 ] ]
Mud and other dead plants buried the organic material in the swamp , and burial kept oxygen away .
TQA:T_1013_3
5
buried
true
bury
[ "where", "did", "something", "bury", "something", "_", "_", "?" ]
[ "in the swamp" ]
[ [ 9, 12 ] ]
Mud and other dead plants buried the organic material in the swamp , and burial kept oxygen away .
TQA:T_1013_3
11
swamp
true
swamp
[ "how long", "can", "someone", "swamped", "_", "_", "_", "?" ]
[ "organic material" ]
[ [ 7, 9 ] ]
Mud and other dead plants buried the organic material in the swamp , and burial kept oxygen away .
TQA:T_1013_3
15
kept
true
keep
[ "how", "is", "something", "kept", "_", "_", "_", "?" ]
[ "away" ]
[ [ 17, 18 ] ]
Mud and other dead plants buried the organic material in the swamp , and burial kept oxygen away .
TQA:T_1013_3
15
kept
true
keep
[ "what", "is", "_", "kept", "_", "_", "somewhere", "?" ]
[ "burial", "Mud and other dead plants", "oxygen away" ]
[ [ 14, 15 ], [ 0, 5 ], [ 16, 18 ] ]
Mud and other dead plants buried the organic material in the swamp , and burial kept oxygen away .
TQA:T_1013_3
15
kept
true
keep
[ "what", "is", "_", "kept", "_", "_", "_", "?" ]
[ "oxygen", "Mud and other dead plants" ]
[ [ 16, 17 ], [ 0, 5 ] ]
Mud and other dead plants buried the organic material in the swamp , and burial kept oxygen away .
TQA:T_1013_3
15
kept
true
keep
[ "where", "is", "something", "kept", "_", "_", "_", "?" ]
[ "in the swamp", "in the swamp , and burial" ]
[ [ 9, 12 ], [ 9, 15 ] ]
When plants are buried without oxygen , the organic material can be preserved or fossilized .
TQA:T_1013_4
3
buried
true
bury
[ "how", "was", "something", "buried", "_", "_", "_", "?" ]
[ "without oxygen" ]
[ [ 4, 6 ] ]
When plants are buried without oxygen , the organic material can be preserved or fossilized .
TQA:T_1013_4
3
buried
true
bury
[ "what", "was", "_", "buried", "_", "_", "_", "?" ]
[ "plants" ]
[ [ 1, 2 ] ]
When plants are buried without oxygen , the organic material can be preserved or fossilized .
TQA:T_1013_4
12
preserved
true
preserve
[ "what", "is", "_", "preserved", "_", "_", "_", "?" ]
[ "the organic material", "organic material" ]
[ [ 7, 10 ], [ 8, 10 ] ]
When plants are buried without oxygen , the organic material can be preserved or fossilized .
TQA:T_1013_4
14
fossilized
true
fossilize
[ "what", "can", "_", "fossilized", "_", "_", "_", "?" ]
[ "the organic material", "plants" ]
[ [ 7, 10 ], [ 1, 2 ] ]
When plants are buried without oxygen , the organic material can be preserved or fossilized .
TQA:T_1013_4
14
fossilized
true
fossilize
[ "when", "can", "something", "fossilized", "_", "_", "_", "?" ]
[ "organic material", "When plants are buried without oxygen" ]
[ [ 8, 10 ], [ 0, 6 ] ]
Sand and clay settling on top of the decaying plants squeezed out the water and other substances .
TQA:T_1013_5
10
squeezed
true
squeeze
[ "what", "is", "_", "squeezed", "_", "out", "_", "?" ]
[ "other substances", "the water and other substances", "Sand and clay settling on top of the decaying plants", "the water" ]
[ [ 15, 17 ], [ 12, 17 ], [ 0, 10 ], [ 12, 14 ] ]
Sand and clay settling on top of the decaying plants squeezed out the water and other substances .
TQA:T_1013_5
10
squeezed
true
squeeze
[ "what", "is", "_", "squeezing", "something", "out", "_", "?" ]
[ "the water and other substances", "Sand and clay" ]
[ [ 12, 17 ], [ 0, 3 ] ]
Millions of years later , what remains is a carbon - containing rock that we know as coal .
TQA:T_1013_6
6
remains
true
remain
[ "what", "_", "_", "remains", "_", "_", "_", "?" ]
[ "a carbon - containing rock that we know as coal", "a carbon - containing rock" ]
[ [ 8, 18 ], [ 8, 13 ] ]
Millions of years later , what remains is a carbon - containing rock that we know as coal .
TQA:T_1013_6
6
remains
true
remain
[ "when", "does", "something", "remain", "_", "_", "_", "?" ]
[ "Millions of years later" ]
[ [ 0, 4 ] ]
Millions of years later , what remains is a carbon - containing rock that we know as coal .
TQA:T_1013_6
11
containing
true
contain
[ "what", "_", "_", "contains", "something", "_", "_", "?" ]
[ "rock" ]
[ [ 12, 13 ] ]
Millions of years later , what remains is a carbon - containing rock that we know as coal .
TQA:T_1013_6
11
containing
true
contain
[ "what", "does", "something", "contain", "_", "_", "_", "?" ]
[ "carbon" ]
[ [ 9, 10 ] ]
Millions of years later , what remains is a carbon - containing rock that we know as coal .
TQA:T_1013_6
11
containing
true
contain
[ "when", "did", "something", "contain", "something", "_", "_", "?" ]
[ "Millions of years later" ]
[ [ 0, 4 ] ]
Millions of years later , what remains is a carbon - containing rock that we know as coal .
TQA:T_1013_6
15
know
true
know
[ "how", "does", "someone", "know", "something", "_", "_", "?" ]
[ "as coal" ]
[ [ 16, 18 ] ]
Millions of years later , what remains is a carbon - containing rock that we know as coal .
TQA:T_1013_6
15
know
true
know
[ "what", "does", "someone", "know", "_", "_", "_", "?" ]
[ "a carbon - containing rock", "carbon - containing rock" ]
[ [ 8, 13 ], [ 9, 13 ] ]
Millions of years later , what remains is a carbon - containing rock that we know as coal .
TQA:T_1013_6
15
know
true
know
[ "who", "_", "_", "knows", "something", "_", "_", "?" ]
[ "we" ]
[ [ 14, 15 ] ]
California once had a number of small coal mines , but the state no longer produces coal .
TQA:T_1014_2
15
produces
true
produce
[ "what", "isn't", "_", "produced", "_", "_", "_", "?" ]
[ "coal" ]
[ [ 16, 17 ] ]
California once had a number of small coal mines , but the state no longer produces coal .
TQA:T_1014_2
15
produces
true
produce
[ "where", "isn't", "something", "produced", "_", "_", "_", "?" ]
[ "California" ]
[ [ 0, 1 ] ]
To turn coal into electricity , the rock is crushed into powder , which is then burned in a furnace that has a boiler .
TQA:T_1014_3
1
turn
true
turn
[ "how", "is", "something", "turned", "_", "into", "something", "?" ]
[ "the rock is crushed into powder , which is then burned in a furnace that has a boiler", "the rock is crushed into powder , which is then burned in a furnace" ]
[ [ 6, 24 ], [ 6, 20 ] ]
To turn coal into electricity , the rock is crushed into powder , which is then burned in a furnace that has a boiler .
TQA:T_1014_3
1
turn
true
turn
[ "what", "is", "_", "turned", "_", "into", "something", "?" ]
[ "coal" ]
[ [ 2, 3 ] ]
To turn coal into electricity , the rock is crushed into powder , which is then burned in a furnace that has a boiler .
TQA:T_1014_3
1
turn
true
turn
[ "what", "is", "something", "turned", "_", "into", "_", "?" ]
[ "electricity", "into electricity" ]
[ [ 4, 5 ], [ 3, 5 ] ]
To turn coal into electricity , the rock is crushed into powder , which is then burned in a furnace that has a boiler .
TQA:T_1014_3
9
crushed
true
crush
[ "how", "is", "something", "crushed", "_", "_", "_", "?" ]
[ "into powder" ]
[ [ 10, 12 ] ]
To turn coal into electricity , the rock is crushed into powder , which is then burned in a furnace that has a boiler .
TQA:T_1014_3
9
crushed
true
crush
[ "what", "is", "_", "crushed", "_", "_", "_", "?" ]
[ "the rock" ]
[ [ 6, 8 ] ]
To turn coal into electricity , the rock is crushed into powder , which is then burned in a furnace that has a boiler .
TQA:T_1014_3
9
crushed
true
crush
[ "why", "is", "something", "crushed", "_", "_", "_", "?" ]
[ "To turn coal into electricity" ]
[ [ 0, 5 ] ]
To turn coal into electricity , the rock is crushed into powder , which is then burned in a furnace that has a boiler .
TQA:T_1014_3
16
burned
true
burn
[ "what", "is", "_", "burned", "_", "_", "_", "?" ]
[ "powder", "coal" ]
[ [ 11, 12 ], [ 2, 3 ] ]