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 person is slicing an onion. Sentence 2: A cat is pooping into a toilet.
0

Sentence 1: Meat is dropped into a pan. Sentence 2: A woman is putting meat in a pan.
3

Sentence 1: A large tan dog is running with a green item in its mouth Sentence 2: The tan dog is carrying a green squeak toy in its mouth.

4