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

statement: Mammals took advantage of an asteroid event., question: What did mammals take advantage of?
an asteroid event

statement: females form fertilized eggs in reproduction, question: What kind of eggs do females form in reproduction?
fertilized eggs

statement: Bats use muscles in the chest to fly, question: What do bats use to fly?

muscles in the chest