TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Who, as the first chairman of the British Rail Board, infamously directed the huge reduction in railway lines across the UK in the 1960s?

SOLUTION: british railways board

PROBLEM: Who wrote `20,000 Leagues Under The Sea`?

SOLUTION: 20,000 leagues under the sea

PROBLEM: What fictional Chinese-American detective, created by Earl Derr Biggers in 1923 for a novel published in 1925, was the subject of over 45 films made between 1926 and 1981?

SOLUTION:
earl derr biggers