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

Ex Input:
statement: Muscles in the upper arm lengthen a person's elbow., question: What lengthens a person's elbow?

Ex Output:
Muscles


Ex Input:
statement: some amphibians use their larynx to attract mates, question: Who uses their larynx to attract mates?

Ex Output:
amphibians


Ex Input:
statement: spiders lack wings, question: What type of spider lacks wings?

Ex Output:

spiders