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.

[Q]: Sentence 1: The man is riding a motorcycle down the road. Sentence 2: A man is riding a red motorcycle on the road.
[A]: 4


[Q]: Sentence 1: The great thing about living here is there's space. Sentence 2: The bad thing is there's space.
[A]: 2


[Q]: Sentence 1: The polar bear is sliding on the snow. Sentence 2: A polar bear is sliding across the snow.
[A]:
5