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: The operating revenues were $1.45 billion, an increase over last year's result of $1.38 billion. Sentence 2: Operating revenues rose to $1.45 billion from $1.38 billion last year.
Example Output: 5

Example Input: Sentence 1: Little white dog wearing a leash jumping after a red ball. Sentence 2: A black and white dog returns a stick in the snow.
Example Output: 1

Example Input: Sentence 1: The entire thing just makes no sense. Sentence 2: See that makes no sense.
Example Output:
4