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: Here is the snowball which I chased the boy who threw at our teacher.

Answer: 0


Question: Bill was bitten the dog.

Answer: 0


Question: Abernathy admitted that the poison pen letter had been written by my sister and himself.

Answer:
1