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: myanmar government has stated myanmar will become opium-free by 2014. Sentence 2: myanmar government stated myanmar is on track to be drug-free by 2014.

Ex Output:
5


Ex Input:
Sentence 1: A dog rides a skateboard. Sentence 2: A dog is riding a skateboard.

Ex Output:
5


Ex Input:
Sentence 1: A man is scalling a sheer rock face with a rope support. Sentence 2: A young man is doing a ski jump with a purple board.

Ex Output:

0