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'.

[EX Q]: Fred threw the ball behind the tree.
[EX A]: 1

[EX Q]: Maxwell isn't half the doctor that feared Marge would realize Tom had confessed that he knew Bill expected him to be.
[EX A]: 1

[EX Q]: The famous mathematician existed a solution to the problem.
[EX A]:
0