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

Ex Input:
Of which Canadian Province is Labrador a part?

Ex Output:
canada

Ex Input:
Dreams from my father, a story of race and heritance is about which politician?

Ex Output:
dreams from my father

Ex Input:
Who directed the 1999 film American Beauty?

Ex Output:
american beauty