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

Ex Output:
1


Ex Input:
Sentence 1: A girl riding on a brown and white horse. Sentence 2: A girl riding a brown horse.

Ex Output:
4


Ex Input:
Sentence 1: Several ferrets climb out of their cage. Sentence 2: Ferrets climb down from a shelf.

Ex Output:

2