instruction: Is the next sentence syntactically and semantically acceptable?

That Plato loved Aster was obvious.
OPTIONS:
- unacceptable
- acceptable

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

The rabbit vanished into thin air.
OPTIONS:
- unacceptable
- acceptable

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Harry has claimed but I do not believe that Melvin is a Communist.
OPTIONS:
- unacceptable
- acceptable

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

I broke the twig and the branch apart.
OPTIONS:
- unacceptable
- acceptable

response:
acceptable