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

[EX Q]: Cocaine alters neurotransmitters in the brain.
[EX A]: What alters neurotransmitters in the brain?

[EX Q]: race vehicles can skid
[EX A]: What can race vehicles do?

[EX Q]: A bill is used for catching food by some birds.
[EX A]:
Who uses a bill to catch food?