Input: What was the U.S. highway death toll in 1969 ?

What kind of thing would answer this question?
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Output: numeric

Input: What hymn did John Steinbeck get his title The Grapes of Wrath from ?

What kind of thing would answer this question?
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Output: entity

Input: What is the difference between optical and digital video ?

What kind of thing would answer this question?
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Output:
description