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

Example Input: Who wrote the poem Elegy Written in a Country Churchyard?
Example Output: elegy written in a country churchyard

Example Input: I which European city will you find 'Dam Square'?
Example Output: dam square

Example Input: Who played Lionel Hardcastle in the TV series 'As Time Goes By'?
Example Output:
as time goes by