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: united states officials do not know how far north korea's nuclear weapons program has progressed. Sentence 2: hill is the head american negotiator on north korea's nuclear weapons program.

Ex Output:
1


Ex Input:
Sentence 1: A woman is eating something. Sentence 2: A woman is eating meat.

Ex Output:
3


Ex Input:
Sentence 1: Peace Rules defeated Funny Cide in the Louisiana Derby. Sentence 2: But neither he nor Peace Rules could keep Funny Cide from drawing away.

Ex Output:

2