instruction: Is the next sentence syntactically and semantically acceptable?

John is prouder of having gone than people who don't know him would expect me to believe he would be.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

The eggs and the cream mixed.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

This key will open the door to the linguistics building.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

John put any carrot from his garden in the salad.

response:
acceptable