If toxic waste containg cyanide is not disposed of properly, it may drain into ponds, streams, sewers, and reservoirs.
There is usually cyanide in toxic waste. 
If toxic waste containg cyanide is not disposed of properly, it may drain into ponds, streams, sewers, and reservoirs.
Does this next sentence follow, given the preceding text?
There is usually cyanide in toxic waste. 

Options: 

 - yes

 - it is not possible to tell

 - no
it is not possible to tell
If toxic waste containg cyanide is not disposed of properly, it may drain into ponds, streams, sewers, and reservoirs.
Does this next sentence follow, given the preceding text?
There is usually cyanide in toxic waste. 

Options: 

 - yes

 - it is not possible to tell

 - no
user
it is not possible to tell
assistant