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: Angela characterized Shelly as a lifesaver.

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

A: 1
****
Q: Nora sent the book to London.

A:
1
****