instruction: Is the next sentence syntactically and semantically acceptable?

I want to should eat plums.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

John believes Sally to be polite.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Nora pushed on the chair.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

People are in the garden

response:
acceptable