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: For purposes of this simulation, the amount of allowances banked from 2002 through 2006 was calculated as the simple difference between the reference case projections and the actual emission trajectory of each scenario. Choices: 1. The simulation incorrectly calculated allowances backed. 2. The simulation did not calculate anything. 3. The simulation calculated allowances backed.

1