question: How much was the worth of intellectual property to the U.S. economy in 2013 ?
answer: more than US$ 5 trillion
turker_answer: The worth of intellectual property to the U.S. economy in 2013 was more than US $ 5 trillion .
rule-based: The worth of intellectual property to the U.S. economy in 2013 was more than US$ 5 trillion .