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 girl is styling her hair. Sentence 2: A girl is filing her nails.

Ex Output:
1


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: U.S. Drone Kills Five Militants in Pakistan Sentence 2: Six Police Officers Killed in Attacks in Dagestan

Ex Output:

0