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'.

[EX Q]: Ellen and Helen talked.
[EX A]: 1

[EX Q]: We loaded ourselves onto the bus.
[EX A]: 1

[EX Q]: The sign warned against skating on the pond.
[EX A]:
1