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.

Sentence 1: A grey cat with green eyes looking into the camera. Sentence 2: A grey, black, and white cat looking at the camera.
3

Sentence 1: My niece is married to a black man. Sentence 2: My great niece is half black.
1

Sentence 1: A cat is playing the piano. Sentence 2: A cat is licking its paw.

0