Problem: Produce a sentence that would be considered grammatically acceptable

Answer: I know which woman Holly will discuss a report about, but I don't know which woman you will.

Problem: Produce a sentence that would be considered grammatically acceptable

Answer: I just saw that girl who Long John's claim that he was a Martian made all the headlines.

Problem: Produce a sentence that would be considered grammatically unacceptable

Answer:
The students looked the high stairs up from the floor.