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: The two dogs blend in with the stuff animals. Sentence 2: Two dogs sit on a couch with many stuffed animals.
Example Output: 3

Example Input: Sentence 1: A gorilla is playing the drums. Sentence 2: A monkey is playing drums.
Example Output: 3

Example Input: Sentence 1: a group of people dancing Sentence 2: A group of men are dancing.
Example Output:
3