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 cow in hay. Sentence 2: A black and white cow in a pen with hay.

Ex Output:
4


Ex Input:
Sentence 1: Meat is dropped into a pan. Sentence 2: A woman is putting meat in a pan.

Ex Output:
3


Ex Input:
Sentence 1: a black and white photo of cows in their stalls. Sentence 2: A black and white photo of cattle at a trough.

Ex Output:

3