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: Liquid ammonia leak kills 15 in Shanghai Sentence 2: Liquid ammonia leak kills at least 15 in Shanghai
Example Output: 5

Example Input: Sentence 1: Spain asks for bank rescue Sentence 2: Spaniard on trial for Cuban dissident’s death
Example Output: 0

Example Input: Sentence 1: A living room with table, chair and sofa alongside a large palm. Sentence 2: A living room with a blue sofa, camp bed, wooden bench and dresser.
Example Output:
2