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 boy is crawling into a dog house. Sentence 2: A cat is playing on the floor.
Example Output: 0

Example Input: Sentence 1: Another shooting linked to the spree occurred Nov. 11 at Hamilton Central Elementary in Obetz, about two miles from the freeway. Sentence 2: The latest shooting linked to the spree was a Nov. 11 shooting at Hamilton Township Elementary School in Obetz, about two miles from the freeway.
Example Output: 5

Example Input: Sentence 1: The man played haki sak in the office. Sentence 2: The man is seasoning the vegetables.
Example Output:
0