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 man is running. Sentence 2: A man is running down a road.
[EX A]: 4

[EX Q]: Sentence 1: An airplane is flying in the air. Sentence 2: A South African Airways plane is flying in a blue sky.
[EX A]: 3

[EX Q]: Sentence 1: A plane being readied for take-off. Sentence 2: A small turboprop plane being loaded on the tarmac.
[EX A]:
3