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: Panda's play on a swing. Sentence 2: A man is playing guitar.

A: 1
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Q: Sentence 1: A bird holding on to a metal gate. Sentence 2: A multi-colored bird clings to a wire fence.

A: 3
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Q: Sentence 1: The train sits at the train station. Sentence 2: The blue train is at the station.

A:
4
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