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: The broader Standard & Poor's 500 Index <.SPX> gave up 11.91 points, or 1.19 percent, at 986.60. Sentence 2: The technology-laced Nasdaq Composite Index .IXIC declined 16.68 points, or 1.01 percent, at 1,636.94.

Ex Output:
1


Ex Input:
Sentence 1: The man hit the other man with a stick. Sentence 2: The man spanked the other man with a stick.

Ex Output:
4


Ex Input:
Sentence 1: Al-Qaida says it captures 70 Yemeni soldiers in Abyan's battle Sentence 2: Al Qaeda clashes, blasts kill 35 soldiers in Yemen

Ex Output:

1