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 Q]: Sentence 1: A dog with a red toy in it's mouth. Sentence 2: A brown dog is carrying a stick in its mouth.
[EX A]: 2

[EX Q]: Sentence 1: South Africa president: Mandela is improving Sentence 2: Afghan president delays signing US deal
[EX A]: 0

[EX Q]: Sentence 1: Two Asian men and Asian woman sit in black massage chairs. Sentence 2: Two Asian men and a woman are relaxing in massage chairs.
[EX A]:
5