TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: In which Indian city is Eden Gardens, the second largest test cricket ground in the world?

SOLUTION: eden gardens

PROBLEM: Which Nation does Aston Villa Goalkeeper Brad Guzan represent?

SOLUTION: brad guzan

PROBLEM: Which South American country has borders with all other South American countries apart from Ecuador and Chile?

SOLUTION:
venezuela