instruction:
Given a statement and question, generate the answer to the question such that the answer is contained in the statement.
question:
statement: Small-sized viviparous mammals evolved by Jurassic times., question: When did small viviparous mammals evolve?
answer:
Jurassic times

question:
statement: teeth also make sharks excellent predators., question: What kind of predator does teeth make?
answer:
sharks

question:
statement: harvesting helps control destruction of crops, question: What does harvesting help control?
answer:
destruction