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.

Ex Input:
Sentence 1: 6.6 quake rocks Indonesia's Papua: USGS Sentence 2: 6.6 quake rocks Indonesia's Papua: US Geological Survey

Ex Output:
5


Ex Input:
Sentence 1: Yes, they are both different. Sentence 2: Opinions are different.

Ex Output:
1


Ex Input:
Sentence 1: Knight agreed to a two-year, $2.38 million contract that included a $300,000 signing bonus. Sentence 2: ESPN reported that Knight's two-year deal is worth $2.38 million, including a $300,000 signing bonus.

Ex Output:

5