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]: Did his having played the piano surprise you?
[A]: 1


[Q]: She asked a man who was near the window whether it looked like rain.
[A]: 1


[Q]: We investigated for bombs in the area.
[A]:
0