TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Lexus is the luxury vehicle division of what car maker?

SOLUTION: lexus

PROBLEM: The Bryce Canyon and Zion National Parks are in which US state?

SOLUTION: bryce canyon national park

PROBLEM: In what country are the ports Oran and Bone?

SOLUTION:
annaba