Detailed Instructions: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
See one example below:
Problem: Who was the first American President?
Solution: president of the united states
Explanation: The question talks about the president of the USA.

Problem: Which astronaut, part of the Apollo 12 mission on November 19th 1969 became the 4th person to walk on the moon after Neil Armstrong, Buzz Aldrin and Pete Conrad ?
Solution:
apollo 12