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

Example Input: Who played Captain Jean-Luc Picard in the television series 'Star-Trek: The Next Generation'?
Example Output: jean-luc picard

Example Input: On which holiday island are the peaks of 'Ruivo' and 'Arieiro', and the airport of 'Santa Cruz'?
Example Output: pico do arieiro

Example Input: What is the name of the girlfriend of Bill Sykes who he murders in the Dickens novel 'Oliver Twist'?
Example Output:
bill sikes