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

Let me give you an example: Who was the first American President?
The answer to this example can be: president of the united states
Here is why: The question talks about the president of the USA.

OK. solve this:
May 25, 1803 saw the birth, in Boston, MA, of what lecturer, essayist, and poet, who, along with Henry David Thoreau, was a founding force behind Transcendentalism?
Answer:
boston