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: When did she leave? Choices:  1. The speaker does not know when she left. 2. The speaker knows when she left. 3. No one knows when she left. 

2