Given the task definition and input, reply with output. 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.

Statement: In order to estimate ozone-related health and welfare effects for the eastern U.S., fullseason ozone data are required for every CAPMS grid-cell. Choices: 1. To estimate ozone effects in eastern us, full season data is required for every CPMS grid cell 2. No data is needed to see the effects of ozone on the us 3. CPMS grid cells are essential for estimating ozone effects
2