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

Sentence 1: the international atomic energy agency has no access to people, documents, sites. Sentence 2: the international atomic energy agency is based in
1

Sentence 1: Three children are eating their food. Sentence 2: The deer jumped over the fence.

0