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: Boy with glasses typing on a computer. Sentence 2: A boy looking at a computer screen.
Example Output: 3

Example Input: Sentence 1: A man and a woman laughing. Sentence 2: A man and a woman kiss.
Example Output: 1

Example Input: Sentence 1: tin foil hat for the dog face, what size do u wear? Sentence 2: tin foil hat for the sarg, what size do u wear?
Example Output:
3