instruction: Is the next sentence syntactically and semantically acceptable?

Fred gave the ball under Molly.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Harriet gave a mug to John and a scarf to Vivien.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Fred feels fine.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Almost any pilot could be flying this plane.

response:
acceptable