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'.

[Q]: Sam didn't pick those packages up until it had stopped raining which are to be mailed tomorrow.
[A]: 0


[Q]: Who did Athena introduce who to?
[A]: 0


[Q]: Fred threw the ball over the fence.
[A]:
1