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: A man is scaling a fish. Sentence 2: A man pours some cooking oil into a pot.
Example Output: 1

Example Input: Sentence 1: A woman is slicing up some meat. Sentence 2: A woman is breading some meat.
Example Output: 2

Example Input: Sentence 1: 'No Evidence' In Afghanistan Massacre Case Sentence 2: US toll in Afghanistan hits 2,000
Example Output:
1