instruction:
Given a statement and question, generate the answer to the question such that the answer is contained in the statement.
question:
statement: A soil sifter can be employed to separate out glass shards., question: What can be used to separate glass shards?
answer:
soil sifter


question:
statement: Tadpoles become frogs after four months., question: After how long do tadpoles become frogs?
answer:
four months


question:
statement: Smog emissions are dangerous., question: What emissions are dangerous?
answer:

Smog