TASK DEFINITION: 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.
PROBLEM: He lifted up to let her get them off and she pushed his pants down .

SOLUTION: Inversion

PROBLEM: Sasha opened her mouth but Peterson cut her off .

SOLUTION: Original

PROBLEM: The ranks of spearmen hastily climbed to their feet , and a cloud of them closed on the Slav ranks .

SOLUTION:
Inversion