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: Five cows are grazing beside the road. Sentence 2: Several sheep grazing in the field.
[EX A]: 1

[EX Q]: Sentence 1: Parked white double decker bus. Sentence 2: A red and white double decker bus is parked.
[EX A]: 4

[EX Q]: Sentence 1: Today, we are trying to convey this problem to Russian President Vladimir Putin and US President George W Bush. Sentence 2: Today, we are trying to convey this problem to Russian President Vladimir Putin (news - web sites) and President Bush (news - web sites).
[EX A]:
5