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: In my almost seven years at the helm of the PRC, if I have learned nothing else, I've learned that each case presents a new challenge. Choices:  1. I started my work at the PRC in March. 2. One thing I have learned in my seven years at the PRC is each case is a new challenge.  3. I have worked at the PRC for ten years now. 

3