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: Nokia apologises for 'faked' ad Sentence 2: US waives riders for Pak aid
[EX A]: 0

[EX Q]: Sentence 1: Obama nominates new transportation secretary Sentence 2: Obama To Meet Embattled Veterans Secretary
[EX A]: 0

[EX Q]: Sentence 1: A turtle is walking. Sentence 2: A tortoise is walking.
[EX A]:
4