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: Close-up of a hummingbird. Sentence 2: A closeup of a hummingbird flying.
4

Sentence 1: A woman is tapping her fingers on a table. Sentence 2: A woman is tapping her fingers.
4

Sentence 1: Two women stand in a living room with a black dog. Sentence 2: Two women standing in a living room with a black dog looking towards the camera.

4