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: Chris Froome rides to Tour de France endgame Sentence 2: Chris Brown concerts cancelled new
Example Output: 0

Example Input: Sentence 1: Could be a lot of things. Sentence 2: Could be a simple mistake.
Example Output: 2

Example Input: Sentence 1: Two men on the side of a barge Sentence 2: A man is lying the grass with long hair and beard.
Example Output:
0