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: His girlfriend bought this computer for him.

SOLUTION: 1

PROBLEM: That the march should go ahead and that it should be cancelled has been argued by different people at different times.

SOLUTION: 0

PROBLEM: John could not visit Sally.

SOLUTION:
1