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: Two foxes are eating from a plate on a brick patio. Sentence 2: Foxes are eating from a plate.
Example Output: 3

Example Input: Sentence 1: What isn't how what was sold? Sentence 2: It's not how it was sold, gb.
Example Output: 2

Example Input: Sentence 1: Train going down the tracks. Sentence 2: Train gliding on tracks.
Example Output:
5