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 animal is eating. Sentence 2: The animal is hopping.

Ex Output:
0


Ex Input:
Sentence 1: a cyclist is making his bike jump between two rocks. Sentence 2: A man jumps his bicycle in the air between two rocks.

Ex Output:
4


Ex Input:
Sentence 1: Journalists hail London Olympics opening Sentence 2: Israeli delegation marches in 2012 Olympics opener

Ex Output:

1