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: Five cows are grazing beside the road. Sentence 2: Several sheep grazing in the field.
Example Output: 1

Example Input: Sentence 1: A man and dog on a rocky seashore. Sentence 2: Man and dog standing on rocks next to water
Example Output: 5

Example Input: Sentence 1: Black and white cat lying under bush. Sentence 2: The black and white cat with yellow eyes lounges in the dirt.
Example Output:
2