You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task you are given a sentence with one coordinating conjunction (for, and, nor, but, or, yet, and so). You must judge whether the order of two coordinated clausal conjoints have been inverted or not. Inversion would result in the sentence sounding unnatural. Label the instances as "Original" or "Inversion" based on your judgment.

He knew it , and he deserved no answer .
Solution: Inversion
Why? "He knew it" and "he deserved no answer" have been inverted.

New input: He could tell she was enjoying herself , and then he started to move slowly .
Solution:
Inversion