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: Mary believed his to have loved her.

SOLUTION: 0

PROBLEM: Willy is taller than I know a boy who is.

SOLUTION: 0

PROBLEM: Once Janet left, Fred became all the crazier.

SOLUTION:
1