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: And Time discounts the warnings of anti-nuke activists who claim that the 72 pounds of plutonium on NASA's soon-to-be-launched Saturn explorer poses a health hazard. Choices:  1. Anti-nuke activists are not aware that NASA has plutonium on its Saturn explorer. 2. There is nothing activists could do to stop NASA's Saturn explorer launch. 3. NASA plans to launch an explorer to Saturn.

1