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: Myanmar’s Suu Kyi urges party unity amid squabbles Sentence 2: Suu Kyi urges party unity amid squabbles
Example Output: 5

Example Input: Sentence 1: The man set up his camera to take sunset pictures at the beach. Sentence 2: A man is taking pictures of a lake.
Example Output: 2

Example Input: Sentence 1: Two people are sailing a small boat. Sentence 2: Two women in a sailboat.
Example Output:
4