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: Zimmerman replied, "What are you doing here?" Sentence 2: Martin said, "Why are you following me?"
Example Output: 1

Example Input: Sentence 1: A woman is cracking eggs into a bowl. Sentence 2: A woman is placing skewers onto a rack.
Example Output: 1

Example Input: Sentence 1: A dog is barking. Sentence 2: A jet is flying.
Example Output:
0