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 the character Gene Hunt in the UK TV series 'Life on Mars' and 'Ashes to Ashes'?
Example Output: life on mars

Example Input: Miss Rosa Dartle is a character in which Charles Dickens novel?
Example Output: james steerforth

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