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.

Example Input: Sentence 1: a man walks two dogs on leashes down the street Sentence 2: A man walks two dogs in the city.
Example Output: 4

Example Input: Sentence 1: After protesters rushed the stage and twice cut power to the microphone, Hedges drew the speech to an early close. Sentence 2: After protesters rushed the stage and twice cut power to the microphone, Hedges cut his speech short.
Example Output: 5

Example Input: Sentence 1: 6.6 quake rocks Indonesia's Papua: USGS Sentence 2: 6.6 quake rocks Indonesia's Papua: US Geological Survey
Example Output:
5