TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Aragon and Castile joined to form which country?

SOLUTION: aragon

PROBLEM: Which Afro American super model, TV personality and singer hosts the TV show, America's Next Top Model and also has her own daytime TV chat show?

SOLUTION: america's next top model

PROBLEM: The songs 'Too darn hot and True love come from which Cole Porter musical which was filmed in 1956 starring Bing Crosby and Grace Kelly?

SOLUTION:
true love