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: The primary focus of Systematic Dialectics is syn chronic, not dia chronic. Sentence 2: Thus, Meta - System - atic Dialectic is Diachronico - Synchronic Dialectic.
[EX A]: 2

[EX Q]: Sentence 1: A man is playing keyboards. Sentence 2: A man is riding a mechanical bull.
[EX A]: 1

[EX Q]: Sentence 1: Russian lawmakers pass new bill restricting Internet Sentence 2: Russia says ballistic 'objects' fired in Mediterranean
[EX A]:
0