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: A gorilla is playing the drums. Sentence 2: A monkey is playing drums.

A: 3
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Q: Sentence 1: A dog is jumping over a barrier at a agility competition. Sentence 2: A dog jumping over an obstacle course fence.

A: 4
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Q: Sentence 1: russia would not immediately increase military strength along russian borders. Sentence 2: russia would not hesitate to increase military strength along russian borders if the need arises.

A:
2
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