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: A twenty-five pound gun set on a battery of the imposing castle above the town has fired a single shell. Choices: 1. The heavy machine gun on the castle's battery shot once. 2. The heavy gun on the castle still remains to be shot. 3. The heavy gun on the castle fired one shot.

1