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: Several cows grazing on the median by the road. Sentence 2: Five cows grazing on a patch of grass between two roadways.
Example Output: 4

Example Input: Sentence 1: Brian Brabazon said his son would get upset but then turn around and befriend his taunters. Sentence 2: Her son would get upset, his mom said, but then turn around and befriend his taunters.
Example Output: 3

Example Input: Sentence 1: Woman dies after abortion refusal Sentence 2: Woman dies after cliff collapses in Dorset
Example Output:
1