Problem: Given the question: Give me the correct facts to answer this: what did ivan pavlov invented?
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The answer is:
Classical conditioning

Problem: Given the question: Give me the correct facts to answer this: who plays ray barone?
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The answer is:
Ray Romano, Michael Buble

Problem: Given the question: Give me the correct facts to answer this: when are the summer olympics held?
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The answer is:
Once every two years