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: George is having lived in Toledo for thirty years.
Example Output: 0

Example Input: The average age at which people begin to need eyeglasses vary considerably.
Example Output: 0

Example Input: We proved conclusively to the authorities Smith to be the thief.
Example Output:
0