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: Two people are walking through some water. Sentence 2: Two girls are walking by a tree in front of a brick building.
Example Output: 1

Example Input: Sentence 1: He urged patience from Americans eager for the service, which is intended to block about 80 percent of telemarketing calls. Sentence 2: The free service was originally intended to block about 80 percent of telemarketer calls.
Example Output:
3