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: Finally, we have cells solar or more formally, photovoltaic cells.

SOLUTION: Inversion

PROBLEM: After long a moment, Charlotte held out her hand to Emma.

SOLUTION: Inversion

PROBLEM: Nick turned and saw never how Julie's eyes filled with tears as they followed him to the door.

SOLUTION:
Inversion