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

Kronos (or Cronus) was the Greek equivalent of which Roman god?
cronus

Will you still be sending me a valentine is a line from which Beatles song?
the beatles

Field Marshal Arthur Wellesley, shares his better known title with which Southern Hemisphere capital city?
arthur wellesley, 1st duke of wellington