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: 20-member parliamentary, trade team leaves for India Sentence 2: Commerce secretary to take leave of absence
[EX A]: 0

[EX Q]: Sentence 1: The rhino grazed on the grass. Sentence 2: A rhino is grazing in a field.
[EX A]:
4