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: Mary has never kissed a man who is taller than John.
Example Output: 1

Example Input: What happened was they knew his parents.
Example Output: 0

Example Input: The knee replacement candidate groaned up the stairs.
Example Output:
1