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

Q: statement: an abacus is used for multiplication, question: What is an abacus used for?

A: multiplication
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Q: statement: upper arm muscles contracting causes a person 's elbow to elongate, question: What muscle contracting causes a person's elbow to elongate?

A: upper arm
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Q: statement: blending with colors and patterns is used by prey to avoid predators, question: Who uses blending with colors and patterns to avoid predators?

A:
prey
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