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 baby monkey scratches itself. Sentence 2: The monkey scratched his tummy.
[EX A]: 3

[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: Activists say they fear the gathering is an attempt by corporate farming to push bio-engineered crops on starving countries. Sentence 2: Instead, they fear the conference is an attempt by corporate farming and biotech interests to push into new markets.
[EX A]:
3