Given a statement and question, generate the answer to the question such that the answer is contained in the statement.

[Q]: statement: Octopuses expel a dark cloud to hide from dolphins., question: What expels a dark cloud to hide from dolphins?
[A]: Octopuses


[Q]: statement: certain therapsids became more mammal-like as they grew., question: What did therapsids become as they grew?
[A]: mammal


[Q]: statement: running requires a lot of joules, question: What does running require?
[A]:
joules