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.

Example Input: Sentence 1: A black dog stands next to materials at a construction site. Sentence 2: An Asian toddler girl sits next to a pot of flowers on a marble post.
Example Output: 0

Example Input: Sentence 1: A man and dog on a rocky seashore. Sentence 2: Man and dog standing on rocks next to water
Example Output: 5

Example Input: Sentence 1: The red train and the yellow train on on the tracks. Sentence 2: Two trains are traveling on the track.
Example Output:
3