instruction: Is the next sentence syntactically and semantically acceptable?

Professor Smith would support Sue and Prof Jones Bill.
OPTIONS:
- unacceptable
- acceptable

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Imogen broke the vase.
OPTIONS:
- unacceptable
- acceptable

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Merlin is extremely evil.
OPTIONS:
- unacceptable
- acceptable

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

I thought she was pregnant
OPTIONS:
- unacceptable
- acceptable

response:
acceptable