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: A field of black faced sheep. Sentence 2: A black faced sheep.

Ex Output:
3


Ex Input:
Sentence 1: amnesty international is a rights group based in london. Sentence 2: the international institute for strategic studies is located in london.

Ex Output:
1


Ex Input:
Sentence 1: The man cut a paper plate. Sentence 2: A man is cutting a paper plate.

Ex Output:

5