Tonight , the ghost hunters Gail Porter and Chris Fleming probe for paranormal activity at the former federal prison -LRB- above -RRB- on Alcatraz Island in San Francisco Bay as part of a 12-hour '' Scariest Places on Earth '' marathon beginning at noon .
San Francisco Bay /location/location/contains Alcatraz Island
NNP , DT NN NNS NN NNP CC NNP NNP NN IN JJ NN IN DT JJ JJ NN -LRB- IN -RRB- IN NNP NNP IN NNP NNP NNP IN NN IN DT JJ '' JJS NNS IN NNP '' NN NN IN NN .
San Francisco Bay
LOCATION
Alcatraz Island
LOCATION
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