instruction: Is the next sentence syntactically and semantically acceptable?

This hat it is certain that he was wearing.

response: acceptable


instruction: Is the next sentence syntactically and semantically acceptable?

A variety of styles have been in vogue for the last year.

response: unacceptable


instruction: Is the next sentence syntactically and semantically acceptable?

She yelled hoarse.

response: unacceptable


instruction: Is the next sentence syntactically and semantically acceptable?

Every woman standing under that tree, whoever she may be, is Mary's friend.

response:
unacceptable