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 group of sheep grazing on a hill. Sentence 2: A group of sheep are on a hill.

Ex Output:
4


Ex Input:
Sentence 1: A woman is speaking in sign language. Sentence 2: A woman spices some seafood.

Ex Output:
1


Ex Input:
Sentence 1: Also missing is Al Larsen, 31, of Fort Worth, Texas, who was in another vehicle swept off the turnpike. Sentence 2: The other victim recovered Tuesday morning was Al Larsen, 31, of Fort Worth, Texas.

Ex Output:

2