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: Is Madeleine McCann Still Alive? Sentence 2: Reopen Madeleine case, police urge
Example Output: 1

Example Input: Sentence 1: A close-up of an animal with a long face standing on grass near a tree. Sentence 2: A close-up of a woman with black boots next to a blue motorcycle.
Example Output: 0

Example Input: Sentence 1: A person is slicing some onions. Sentence 2: A hamster is singing.
Example Output:
0