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: An elderly woman rides a bicycle along a city street. Sentence 2: An elderly woman walking uphill crossing the street.
Example Output: 2

Example Input: Sentence 1: A dog with big ears is holding a small stick in it's mouth. Sentence 2: A puppy with big ears chewing on a stick.
Example Output:
4