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: In order to value the expected life years lost for COPD and non-COPD deaths, we need to construct estimates of the value of a statistical life year. Choices: 1. Estimates of the value of a statistical life year are needed for calculation of expected life years lost for COPD deaths. 2. There is no need to estimate the value of a statistical life year. 3. COPD deaths will cause the loss of 500,000 life years.

3