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: Residents return to Texas blast site Sentence 2: Residents return to Fallujah
Example Output: 0

Example Input: Sentence 1: Man is carrying a tool box down the sidewalk. Sentence 2: A woman is riding a blue bicycle in a park.
Example Output:
0