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

[EX Q]: Lopburi, Phichit and Ang Thong are provinces in which Asian country?
[EX A]: phichit

[EX Q]: Which late 17th and early 18th century British architect designed Brighton Pavilion, Marble Arch, and the plan for London's Regents Park?
[EX A]: royal pavilion

[EX Q]: Which German philosopher wrote 'Das Kapital'?
[EX A]:
capital: critique of political economy