TASK DEFINITION: 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'.
PROBLEM: Left Tom the party already?

SOLUTION: 0

PROBLEM: John was unknown to be the murderer.

SOLUTION: 0

PROBLEM: Tom got understood to have asked for a refund.

SOLUTION:
0