instruction:
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.
question:
Who wrote the poem do not stand at my grave and weep?
answer:
Mary Elizabeth Frye


question:
How did will smith lose his arm in irobot?
answer:
a car crash


question:
When did the chinese first use fingerprint as identification?
answer:

221 to 206 BC