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 man is adding oil to car. Sentence 2: A man is putting anti-freeze into a car.

Ex Output:
2


Ex Input:
Sentence 1: Two large dogs running in some grass. Sentence 2: Two brindle dogs running in the grass.

Ex Output:
4


Ex Input:
Sentence 1: Fallen US firefighters brought home Sentence 2: Wall Street ends slightly lower

Ex Output:

0