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 young boy plays in a red ball pit. Sentence 2: A laughing boy lies on a pit of blue balls.

Ex Output:
3


Ex Input:
Sentence 1: The woman is walking her dog. Sentence 2: A woman walks her dog down the street.

Ex Output:
4


Ex Input:
Sentence 1: A coalition of campaign groups, including the militant national students body, is backing the protests, which the NLC called in defiance of a court order banning them. Sentence 2: A coalition of campaign groups, including the militant national students body, is backing the action and is mobilising for protests.

Ex Output:

3