You will be given a definition of a task first, then some input of the task.
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

In the 1876 novel 'The Adventures of Tom Sawyer' by Mark Twain, what is the name of Tom's half brother who lives with Tom and his aunt Polly?
Output:
the adventures of tom sawyer