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.

Ex Input:
Sentence 1: 3 Suspects Taken Into Custody in Boston Bombing Case Sentence 2: Boston police say 3 taken into custody in Marathon bombing

Ex Output:
5


Ex Input:
Sentence 1: A gray cat with green eyes looks at the camera. Sentence 2: A grey cat with green eyes looking into the camera.

Ex Output:
5


Ex Input:
Sentence 1: The person is removing the scales from the fish. Sentence 2: A person is descaling a fish.

Ex Output:

5