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: That was probably just a hoax , but a few of them might look like people .

SOLUTION: Inversion

PROBLEM: They sought to break him with their tortures , but he was an old man , one used to keeping secrets .

SOLUTION: Original

PROBLEM: Mrs. White recruited bullies from our school who tailed us to the library , but we had the Stargazer .

SOLUTION:
Inversion