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

Example Input: Which composer was married to Clara Wieck from 1840 until his death in 1856?
Example Output: clara schumann

Example Input: Who died of a burst appendix after being punched in the stomach?
Example Output: appendicitis

Example Input: Cambodia, which over the course of 1841 to 1953 was under the joint suzerainty of Thailand and Vietnam then was a monarchy under the protection of France which included an occupation by Japan, was steered to independence in 1953 by whom?
Example Output:
cambodia