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: Suspected Saudi militant dies in Lebanese custody Sentence 2: Suspected US drone kills 6 militants in Yemen
Example Output: 0

Example Input: Sentence 1: turkmenistan borders afghanistan. Sentence 2: sistan-baluchestan borders afghanistan and pakistan.
Example Output: 2

Example Input: Sentence 1: A man is shaking a container over a kitchen sink. Sentence 2: A man is emptying a plastic container.
Example Output:
2