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: The argument is that the Senate should reject the case not because it's unproven but because it's politically motivated. Choices: 1. It's unproven, because the proof has been disposed of. 2. The Senate should not reject the case, because there is no proof. 3. The argument is that the Senate should reject the case because it's politically motivated, not because it's unproven.

1