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

The film The Curious Case of Benjamin Button, starring Brad Pitt, is based on a short story by whom?
the curious case of benjamin button

Barabas is the central character in what 16th century play?
barabas

Which 1972 movie, Oscar nominated for best picture, was advertised by the tag-line Four men ride a wild river, a weekend turns into a nightmare?
academy award for best picture