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 black and white photo of a cat lying down. Sentence 2: A black and white image of a cat laying on a rug.

Ex Output:
4


Ex Input:
Sentence 1: Tropical Storm Isaac boosts jobless claims Sentence 2: Tropical Storm Joyce forms, stays in open Atlantic

Ex Output:
1


Ex Input:
Sentence 1: 6 czech hospital employees are charged with human organ trafficking. Sentence 2: the accused will be charged with international drug trafficking.

Ex Output:

1