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: when did angel leave buffy the vampire slayer

A: 1999
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Q: who came in second in the 2018 kentucky derby

A: Good Magic
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Q: when did the first grass appear on earth

A:
around 40 million years ago
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