Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
One example is below.
Q: Who was the first American President?
A: president of the united states
Rationale: The question talks about the president of the USA.
Q: In what city might you visit the Alamo or take a stroll on the River Walk?
A:
alamo mission in san antonio