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 man riding a white horse in an arena. Sentence 2: A man riding a white horse.
4

Sentence 1: The woman is peeling shrimp. Sentence 2: The man is holding a lemur.
0

Sentence 1: A table and chairs are in a room with a picture on the wall and a ceiling fan. Sentence 2: A school bus driving down a road with green trees and grass in the background.

0