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: This estimate for the potential number of FGD retrofits considers the resource and labor requirements of the simultaneous installation of SCRs, which is further discussed under the labor section (6. Choices: 1. It is a comprehensive cost analysis.  2. Labor requirements are considered when considering the estimate for retrofits. 3. No other information is available on the subject. 

1