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: During the 1970s, Ekman developed a method called the Facial Action Coding System (FACS) to measure all visually discernible facial movement. Choices: 1. Ekman has invented only FACS and nothing else. 2. Ekman developed FACS to measure facial movement.   3. Ekman did not develop a method to measure facial movement.  

1