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.
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Question: When was the song you're so vain written?

Answer: 1971


Question: Who plays harry in the amazing spider man?

Answer: Dane William DeHaan


Question: The plant which propagates with the help of its leaves is?

Answer:
Bryophyllum daigremontianum, Kalanchoe pinnata