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: Black bird sitting on a concrete slab. Sentence 2: Small dog sitting next to white wall.

Ex Output:
1


Ex Input:
Sentence 1: Parked white double decker bus. Sentence 2: A red and white double decker bus is parked.

Ex Output:
4


Ex Input:
Sentence 1: A woman sits alone against a brick wall Sentence 2: A woman is walking with a red bag.

Ex Output:

1