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 pill, which they call the "polypill," would contain aspirin, a cholesterol-lowering drug, three blood pressure-lowering drugs at half the standard dose and folic acid. Sentence 2: The ingredients of such a polypill would contain aspirin, a cholesterol-lowering statin, three blood pressure-lowering agents in half dose, and folic acid.
Example Output: 5

Example Input: Sentence 1: Japan's opposition party chief criticizes Abe's economic policies Sentence 2: Zimbabwe‚Äôs opposition MDC party challenges Robert Mugabe‚Äôs election win
Example Output: 0

Example Input: Sentence 1: Chris Froome rides to Tour de France endgame Sentence 2: Chris Brown concerts cancelled new
Example Output:
0