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: Obama is extreme and leftwing. Sentence 2: Obama is part of the extreme leftwing.
[EX A]: 5

[EX Q]: Sentence 1: A dog rides a skateboard. Sentence 2: A dog is riding a skateboard.
[EX A]: 5

[EX Q]: Sentence 1: What does pressing the number one do? Sentence 2: Pressing the number one does English.
[EX A]:
2