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

Ex Input:
Where on Prince Edward Island, Canada, is Anne of Green Gables located?

Ex Output:
canada


Ex Input:
Which evolutionary biologist wrote The Ancestor's Tale in 2004?

Ex Output:
the ancestor's tale


Ex Input:
In Arthurian legend, who was the father of King Arthur?

Ex Output:

king arthur