instruction: Is the next sentence syntactically and semantically acceptable?

What did Bill allege that Roger had eaten?

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Did Sue not pass her exam?

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Humans love to eat owners of pigs.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

It was then that he felt a sharp pain.

response:
acceptable