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

Example Input: Cinder Cone, composite, and shield are all types of what?
Example Output: cinder cone

Example Input: The French wine growing areas of Macon, Beaujolais and Chablis are in which region?
Example Output: macon

Example Input: The River Yarra flows through which city?
Example Output:
yarra river