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: That would be good, but how is it to be done? Choices:  1. I want to be an astronaut but how will I pay for school? 2. I like that but how can we do it? 3. I know how we can do it but why would we want to?

3