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: 1 Many of the challenges discussed in that series represent long-standing, difficult, and complex problems that our work has shown will not be easily or quickly resolved. Choices: 1. The series on workplace safety discusses many challenges that are not easy to solve.  2. That series discusses several challenges that won't be easily overcome.  3. The challenges which are discussed in the series are ones that can be quickly solved. 

1