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: He retreated with Sibley's force back east and fought through the rest of the war on the Southern side. Choices: 1. The war was not fought on the Southern side. 2. Part of the war was fought on the Southern side. 3. Part of the war was fought on the Southern side because they had a bigger chance of defeating their enemies from there.

3