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 man walks two dogs on leashes down the street Sentence 2: A man walks two dogs in the city.

A: 4
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Q: Sentence 1: Scenario A assumes that the CO growth rate accelerates by .%/yr. Sentence 2: It assumes that methane growth rate accelerates by .%/yr.

A: 2
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Q: Sentence 1: US Special Forces troops are training Colombian soldiers at military bases in the region to protect the pipeline, which transports crude from Colombia's second-biggest oil field. Sentence 2: U.S. Special Forces troops are training Colombian soldiers at military bases in the region to protect the pipeline.

A:
3
****