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: It's just an idea that came into my head a long time ago. Choices:  1. I never really thought of that. 2. I've had a rough idea for a while. 3. It's an idea I came up with a while ago.

1