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: Her stepmother always clad her in black.

SOLUTION: 0

PROBLEM: John is leaving but Mary's not.

SOLUTION: 1

PROBLEM: The collaborators escaped the convict.

SOLUTION:
0