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: Peter Lyman and Hal Varian of Berkeley's School of Information Management and Systems say that information production has increased by 30 percent each year between 1999 and 2002. Sentence 2: That task appealed to two masters of the megabyte, Peter Lyman and Hal Varian, professors at the University of California-Berkeley's School of Information Management and Systems.

Ex Output:
2


Ex Input:
Sentence 1: A women sitting in a chair at Christmas holding make up. Sentence 2: A train sitting on the tracks in a train yard.

Ex Output:
0


Ex Input:
Sentence 1: The boy played his trumpet. Sentence 2: A boy is playing the trumpet.

Ex Output:

4