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: Every politician is worried when the press starts attacking him.
Example Output: 1

Example Input: Mike will sing if you will sing.
Example Output: 1

Example Input: The boy who I watched Bill and was vain.
Example Output:
0