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: Two soccer players battle for the ball during an intense match. Sentence 2: Two little orange and white dogs are in the snow.

Ex Output:
0


Ex Input:
Sentence 1: A small black dog is in the grass. Sentence 2: A black dog is running in the grass.

Ex Output:
4


Ex Input:
Sentence 1: Syria urges refugees to return Sentence 2: Syria's tenuous truce takes hold

Ex Output:

1