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

Example Input: Where is the Barbary Coast?
Example Output: barbary coast

Example Input: Who is the current Australian prime minister ?
Example Output: australia

Example Input: Name the 1978 TV programme in which Lorne Green played Commander Adama and Dirk Benedict plays Lieutenant Starbuck?
Example Output:
dirk benedict