instruction: Is the next sentence syntactically and semantically acceptable?

He's such a tall man that doors are dangerous to him.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

We would prefer John to be the candidate.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Did that Medea killed her children upset Jason?

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Who do you think that Bill believes to be innocent?

response:
acceptable