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: Obama widens lead over Romney despite jobs data: Reuters/Ipsos poll Sentence 2: Romney takes lead over Obama with convention "bounce": Reuters/Ipsos poll
Example Output: 1

Example Input: Sentence 1: Five alternate jurors were also chosen, with a final one set to be selected Friday morning from the panel. Sentence 2: Five alternate jurors also were selected, with a sixth alternate to be picked on Friday.
Example Output: 5

Example Input: Sentence 1: A person is adding chili powder to chili with beans. Sentence 2: The man is adding seasoning to the beans.
Example Output:
4