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

[Q]: Whose tale in Chaucer's The Canterbury Tales tells of a knight sent away by his queen to discover what women want above all else?
[A]: the canterbury tales

[Q]: What is the smallest country in Central America Costa Rica, Venezuela or El Salvador?
[A]: central america

[Q]: What are Lithium, Sodium, Potassium, Rubidium and Caesium?
[A]:
lithium