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'.

[Q]: That Jack ever slept is impossible.
[A]: 1


[Q]: The hardest that I believe that it ever snowed was last January 12th.
[A]: 1


[Q]: If Ron knows whether to wear a tuxedo, and Caspar knows whether not to, do they know different things?
[A]:
1