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]: I confused Maria and Anna.
[EX A]: 1

[EX Q]: Who do you think that has given the tickets to Bill?
[EX A]: 0

[EX Q]: The couple waltzed to the window.
[EX A]:
1