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

Example Input: Which group had UK top ten hits in 1987 with 'Sweet Little Mystery' and 'Angel Eyes'?
Example Output: angel eyes

Example Input: Who has written a series of novels, entitled The Dark Tower, of which the first, in 1982, was entitled, The Gunslinger?
Example Output: the dark tower

Example Input: Which town in East Sussex now stands on the site of the battle of Hastings?
Example Output:
battle of hastings