instruction: Is the next sentence syntactically and semantically acceptable?

Calvin has not eaten his dinner.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Jack sprayed paint on the wall.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

He told me how many employees Karen introduced to the visitors.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Fred had a snake behind the car Joe was sitting in.

response:
acceptable