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: Algerian priest to lecture about Christian heritage in N. Africa Sentence 2: Telstra applies to list China site in NY

Ex Output:
0


Ex Input:
Sentence 1: They know that the video doesn't show a gas chamber. Sentence 2: The bottom line is that the video clip doesn't show a gas chamber.

Ex Output:
5


Ex Input:
Sentence 1: Two young people are sitting at a table next to a sliding glass door, with one person pointing at the other. Sentence 2: Two people sit facing each other at a table as one points at the other.

Ex Output:

4