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: Seniors would then have to pay 50 percent of their drug costs up to $3,450. Sentence 2: Above that, Medicare would pay 90 percent of all drug costs.
[EX A]: 2

[EX Q]: Sentence 1: A man wearing a orange vest is canoeing in the blue water. Sentence 2: A man in an orange jacket raising his hands to the sky in the sand.
[EX A]: 2

[EX Q]: Sentence 1: the united states government has accused the iranian government of trying to develop nuclear weapons under the cover of a civilian nuclear program. Sentence 2: the us and allies have accused iran of attempting to develop nuclear weapons under the guise of a civilian nuclear program.
[EX A]:
5