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: Man standing in front of yellow corvette. Sentence 2: A man is standing next to a yellow sports car.
Example Output: 3

Example Input: Sentence 1: Glover spoke at a news conference that included about 20 relatives of the victims. Sentence 2: About 20 family members of the victims were invited to the news conference.
Example Output: 3

Example Input: Sentence 1: Meningitis is an infection of the spinal cord fluid and the tissue around the brain. Sentence 2: Meningitis is an infection of the fluid in a person's spinal cord and around the brain.
Example Output:
5