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 white dog with red ears is running in the snow. Sentence 2: a wet black dog with a red collar is in the river
Example Output: 1

Example Input: Sentence 1: A woman with a knife is slicing a pepper. Sentence 2: A women slicing green pepper.
Example Output: 4

Example Input: Sentence 1: An orange kitten lay on a leather couch. Sentence 2: Young couple sitting on a black couch.
Example Output:
1