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: Nancy is light years ahead of the curve on this stuff. Choices:  1. This stuff is Nancy's specialty. 2. Nancy has studied this stuff a lot. 3. Nancy doesn't know anything about this stuff.

3