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: His lateness this morning was stroke a of luck.

SOLUTION: Inversion

PROBLEM: She would not doubt freedom if was the most precious commodity in his life.

SOLUTION: Inversion

PROBLEM: I wondered if that mentioning the Alchemists had no records of vampire hunters - not in several centuries, at least - would be helpful or not.

SOLUTION:
Inversion