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.

Input: Consider Input: Sentence 1: Suspected Saudi militant dies in Lebanese custody Sentence 2: Suspected US drone kills 6 militants in Yemen

Output: 0


Input: Consider Input: Sentence 1: A woman is riding an elephant. Sentence 2: A man is lifting himself.

Output: 0


Input: Consider Input: Sentence 1: VeriSign introduced its Site Finder service on Sept. 15. Sentence 2: The battle around VeriSign"s three-week-old Site Finder service rages on.


Output: 2