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

Example Input: Between 1958 and 1972 all Cliff Richard single records were released on which record label?
Example Output: cliff richard

Example Input: What was the name of country music`s first superstar who died at the age of 29 from drink and drug abuse?
Example Output: country music

Example Input: Antietam and Fredericksburg were high casualty battles in which war?
Example Output:
battle of antietam