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 woman is tapping her fingers on a table. Sentence 2: A woman is tapping her fingers.

Ex Output:
4


Ex Input:
Sentence 1: The baby is laughing and crawling. Sentence 2: A baby is laughing and crawling on the floor.

Ex Output:
4


Ex Input:
Sentence 1: Two arrests made after protest against Nigel Farage Sentence 2: Kerry vows progress after latest intensive Mideast trip

Ex Output:

0