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

Input: Consider Input: Who played the character Gene Hunt in the UK TV series 'Life on Mars' and 'Ashes to Ashes'?

Output: life on mars

Input: Consider Input: Who had a hit album with Back to Bedlam in 2005?

Output: back to bedlam

Input: Consider Input: Which astronaut, part of the Apollo 17 mission on December 11th 1972 became the last of two men to walk on the moon along with fellow astronaut Harrison Schmitt ?
Output: apollo 17