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 person wearing a bike helmet talks on a cell phone. Sentence 2: A person wearing a helmet rides a bike near a white structure.
[EX A]: 3

[EX Q]: Sentence 1: Two die in Syria violence after UN monitors land Sentence 2: Two year doping ban for Contador
[EX A]: 0

[EX Q]: Sentence 1: morals do not exist, so technically nothing can be morally wrong. Sentence 2: I ask again if God does not exist can anything be morally wrong?
[EX A]:
2