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 big turtle is walking. Sentence 2: The tortoise is walking.

Ex Output:
4


Ex Input:
Sentence 1: A man riding a white horse in an arena. Sentence 2: A man riding a white horse.

Ex Output:
4


Ex Input:
Sentence 1: Their contract will expire at 12:01 a.m. Wednesday instead of 12:01 a.m. Sunday, said Rian Wathen, organizing director for United Food and Commercial Workers Local 700. Sentence 2: It has outraged the membership, said Rian Wathen, organizing director of United Food and Commercial Workers Local 700.

Ex Output:

2