In this task, You are given an open-domain question that can be answered based on factual information. Your task is to provide \*short\* answer (in a few words only) for the given question. The short answer can be one or more entities or it can also be boolean \*yes\* or \*no\*.

Q: malware that essentially is a form of social engineering

A: Trojan horses
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Q: who banned the book where the wild things are

A: teachers
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Q: when did it become mandatory to have a social security number

A:
November 1935
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