In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.

Q: Who wrote the poem do not stand at my grave and weep?

A: Mary Elizabeth Frye
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Q: Who needed the brain in wizard of oz?

A: the Scarecrow
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Q: What date did canada declare war on germany?

A:
10 September 1939
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