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

Example Input: In which city was Christopher Columbus born?
Example Output: columbus

Example Input: Released last month, People, Hell and Angels is a posthumous album made up of songs recorded by which artist in 1969 ?
Example Output: angel

Example Input: Who played Edith Piaf in the 2007 film 'La Vie En Rose'?
Example Output:
la vie en rose