instruction: Is the next sentence syntactically and semantically acceptable?

What the baby did was chew the biscuit.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Where and when did Bill put the book?

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

That the fuzz wanted him worried John, but that the fuzz wanted John didn't worry Mary.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Swimming is fun, and I believe that people who can't should be taught to.

response:
acceptable