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 was so old that Red's father couldn't tell Red when it had been built. Choices:  1. Red's father knew when it was built. 2. Red's father hadn't been born when it was built. 3. Even Red's father didn't know how old it was.

1