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'.

Example Input: John was unknown to be the murderer.
Example Output: 0

Example Input: I know a man who Tom drives as does.
Example Output: 0

Example Input: Once Janet left, Fred became far crazier.
Example Output:
1