Definition: In this task, you're given a statement and three sentences as choices. Your job is to determine the neutral choice based on your inference from the statement and your commonsense knowledge. The neutral choice is a sentence that neither agrees nor disagrees with the statement. Indicate your answer as '1', '2', or '3', corresponding to the choice number of the selected sentence. If sentence X agrees with sentence Y, one's correctness follows from the other one. If sentence X disagrees with sentence Y, they can not be correct at the same time.
Input: Statement: Three kinds of theories of history have been prominent in recent discussion--ending theories, wave theories, and cycle theories. Choices: 1. The discussions of three kinds of theories of history tend to get heated. 2. There are three kinds of theories of history. 3. There are only four different theories on history.

1