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 riding a small bicycle. Sentence 2: A man is doing a wheelie on a bike.
Example Output: 3

Example Input: Sentence 1: A man removes a couple of toaster scrambles from a plastic packet. Sentence 2: A man removes food from a bag.
Example Output: 2

Example Input: Sentence 1: Rock bands' plane makes emergency landing in Ill. Sentence 2: Rock Bands' Plane Makes Emergency Landing in Ill.
Example Output:
5