TASK DEFINITION: In this task you are given a sentence. You must judge whether there exist two consecutive words within the sentence with flipped orders, that is, whether the sentence will make sense and be correct if the order of two consecutive words changes. Label the instances as "Inversion" or "Original" based on your judgment.
PROBLEM: Not wanting to neglect any part of him, Claire unfastened the button of pants his and loosened the zipper.

SOLUTION: Inversion

PROBLEM: He opened his mouth to reply and found himself saying nothing, his face turning warm.

SOLUTION: Original

PROBLEM: Might as well be proactive.

SOLUTION:
Original