Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
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Question: Which SF author wrote The Day it Rained Forever?

Answer: the day it rained forever


Question: Grace Anna Goodhue was the wife of which US President?

Answer: grace coolidge


Question: Which television scriptwriter created the children's programmes 'The Clangers', 'Ivor the Engine' and 'Bagpuss'?

Answer:
bagpuss