instruction: Is the next sentence syntactically and semantically acceptable?

I think it's time you give your lovely illness to someone else!

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

The Ferrari which Pietro bought from me and Sofia adores him cost him a bundle.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

She told him the whole story.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Gilgamesh has never flown a dragon.

response:
acceptable