Definition: In this task, you're given a statement and three sentences as choices. Your job is to determine the neutral choice based on your inference from the statement and your commonsense knowledge. The neutral choice is a sentence that neither agrees nor disagrees with the statement. Indicate your answer as '1', '2', or '3', corresponding to the choice number of the selected sentence. If sentence X agrees with sentence Y, one's correctness follows from the other one. If sentence X disagrees with sentence Y, they can not be correct at the same time.
Input: Statement: However, the only patients who showed a differential effect from the brief intervention were precontemplators in the 13- to 17-year-old group. Choices: 1. No one showed an effect. 2. Patients showd an effect when doctors staged an intervention. 3. Only some patients showed a differential effect.

2