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: Mr Colpin did not specify whether it was this system that was at the centre of the investigation. Sentence 2: Neither OLAF nor the Belgian prosecutors have specified if it was this system that was at the centre of the investigation.

Ex Output:
2


Ex Input:
Sentence 1: A man is tying his shoe. Sentence 2: A man ties his shoe.

Ex Output:
5


Ex Input:
Sentence 1: Senate to vote on moving ahead on Hagel nod Sentence 2: Benedict comes home to new house and new Pope

Ex Output:

0