You will be given a sentence. Check whether the sentence is grammatically correct and is meaningful. If the sentence is grammatically correct, then answer with '1', otherwise answer with '0'.
--------
Question: The person with who we were talking left.

Answer: 0


Question: The sign warned against skating on the pond.

Answer: 1


Question: They said nobody would pay up, but I know a boy who did pay up.

Answer:
1