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 man is eating a banana by a tree. Sentence 2: A man is eating a banana.
Example Output: 4

Example Input: Sentence 1: I think you are missing the point with entrepreneurs. Sentence 2: Again I think you are missing the point on the Twain quote.
Example Output: 1

Example Input: Sentence 1: Barack Obama's bodyguards sent back to US after prostitution scandal Sentence 2: Barclays boss falls to rate fixing scandal
Example Output:
0