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:
To which actress is Daniel Craig married?

Ex Output:
daniel craig

Ex Input:
Which country was the birthplace of Henry V111's first wife Catherine Of Aragon ?

Ex Output:
aragon