Input: What drug did Sigmund Freud become fascinated with while experimenting with the treatment of neurasthenia ?

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

Input: What is Jimmy Olsen 's full name ?

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

Input: What is the use of a 24-hour clock instead of a 12-hour clock ?

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