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: At last she heard footsteps inside, and a moment later Mrs. Vandemeyer herself opened the door. Choices: 1. No one opened the door.  2. She heard footsteps, then Mrs. Vandemeyer opened the door.  3. Mrs. Vandemeyer opened the door while holding her pet dog.

3