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: Egypt votes in new constitution Sentence 2: Egyptians Vote On New Constitution

Ex Output:
5


Ex Input:
Sentence 1: Two die in Syria violence after UN monitors land Sentence 2: Two year doping ban for Contador

Ex Output:
0


Ex Input:
Sentence 1: 3 dead, 27 injured in SW China accident Sentence 2: 35 dead and 165 missing in India boat accident

Ex Output:

0