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

Example Input: Who plays Isobel Crawley in the UK television series 'Downton Abbey'?
Example Output: downton abbey

Example Input: What highly influential movement of artwork is considered established by Picasso, Braque, Metzinger and others in Paris, 1911?
Example Output: jean metzinger

Example Input: Which 1942 film features the line Play it Sam, play 'As time goes by'?
Example Output:
sam