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

Example Input: Lopburi, Phichit and Ang Thong are provinces in which Asian country?
Example Output: phichit

Example Input: In March 1992 'Deeply Dippy' was the only number one hit for which group?
Example Output: deeply dippy

Example Input: Who had overall command of the US Pacific Fleet at the Battle of Midway in June 1942 and later signed the Japanese surrender document in 1945?
Example Output:
battle of midway