Definition: In this task, you're given a statement, and three sentences as choices. Your job is to determine which sentence clearly disagrees with the statement. Indicate your answer as '1', '2', or '3' corresponding to the choice number of the selected sentence.
Input: Statement: yeah and it's i forget how many millimeters so you used the metric Choices:  1. I'm not sure how many milimeters. 2. I know exactly how many millimeters. 3. I have a vague idea of how many millimeters.

2