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: Train in a station. Sentence 2: Trains inside an indoor station.

A: 4
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Q: Sentence 1: A young man and woman sitting on a bench outside are kissing. Sentence 2: The man and woman sitting on a bench are kissing.

A: 5
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Q: Sentence 1: A pug dog wits on a yellow chair next to a green dumpster. Sentence 2: A bulldog sitting on a yellow chair beside a large waste receptacle.

A:
3
****