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: I think he'd be better for American business interests overall. Sentence 2: Would he be better for American society?
Example Output: 2

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

Example Input: Sentence 1: Two German tourists, two pilots killed in Kenya air crash Sentence 2: Senator Reid involved in Las Vegas car crash: CNN
Example Output:
1