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 gorilla is playing the drums. Sentence 2: A monkey is playing drums.
[EX A]: 3

[EX Q]: Sentence 1: A young man and woman sitting on a bench outside are kissing. Sentence 2: The man and woman sitting on a bench are kissing.
[EX A]: 5

[EX Q]: Sentence 1: No, none of those factors account for the recent warming. Sentence 2: You don't know if those factors account for the warming, or not.
[EX A]:
3