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.

[Q]: Sentence 1: US Cannot 'Conclusively Determine' Chemical Weapons Use in Syria Sentence 2: U.S. Sees No Conclusive Evidence of Chemical Arms Use by Syria
[A]: 5

[Q]: Sentence 1: A bloody man and woman pose for a picture. Sentence 2: A man in woman dressed warmly pose for a picture.
[A]: 2

[Q]: Sentence 1: Oracle shares fell 27 cents, or 2 percent, to $13.09. Sentence 2: Oracle shares also rose on the news, up 15 cents to $13.51 on the Nasdaq.
[A]:
2