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: The great thing about living here is there's space. Sentence 2: The bad thing is there's space.

Ex Output:
2


Ex Input:
Sentence 1: 3 Suspects Taken Into Custody in Boston Bombing Case Sentence 2: Boston police say 3 taken into custody in Marathon bombing

Ex Output:
5


Ex Input:
Sentence 1: Dignitaries pay tribute to Paul Desmarais Sentence 2: Stars pay tribute to James Garner

Ex Output:

0