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 green birds fly towards a wooden telephone pole. Sentence 2: Two green birds flying above the telephone wires.
Example Output: 3

Example Input: Sentence 1: Earlier on Monday, Grant Thornton SpA repeated previous statements that it was "a victim of fraudulent action". Sentence 2: Grant Thornton claims that it too was the “victim” of a fraud.
Example Output: 3

Example Input: Sentence 1: Fairies don't exist - fine. Sentence 2: Satyrs don't exist - fine.
Example Output:
1