Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Grace Anna Goodhue was the wife of which US President?
grace coolidge

Who won the 2011 Booker Prize for 'The Sense of an Ending'?
the sense of an ending

Which British Prime Minister, born in Chelsea in February 1894, died on December 29th 1986 aged 92 ?

chelsea