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 woman is cutting a leak. Sentence 2: A woman is slicing a leek.
Example Output: 4

Example Input: Sentence 1: A wooden bicycle with an awning. Sentence 2: A group of elderly people sitting around a dining table.
Example Output: 0

Example Input: Sentence 1: An elderly woman stands in a kitchen with two cats at her feet. Sentence 2: The old lady is standing in the kitchen with two cats at her feet.
Example Output:
5