Evaluate the similarity between them and classify them into classes from 0-5 as follows:
0 : The two sentences are completely dissimilar.
1 : The two sentences are not equivalent, but are on the same topic.
2 : The two sentences are not equivalent, but share some details.
3 : The two sentences are roughly equivalent, but some important information differs/missing.
4 : The two sentences are mostly equivalent, but some unimportant details differ.
5 : The two sentences are completely equivalent, as they mean the same thing.

[Q]: Sentence 1: china is north korea's closest ally. Sentence 2: north korea is a reclusive state.
[A]: 1


[Q]: Sentence 1: A group of sheep grazing on a hill. Sentence 2: A group of sheep are on a hill.
[A]: 4


[Q]: Sentence 1: A dog is running on the ground. Sentence 2: A girl is tapping her finger nails.
[A]:
0