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.
--------
Question: Sentence 1: Prince is replacing Sanford "Sandy" Weill, who will remain Citigroup's chairman. Sentence 2: Prince, who heads Citigroup's global corporate and investment bank, is replacing Sanford Weill as CEO.

Answer: 3


Question: Sentence 1: A person wearing a helmet rides a bike near a white structure. Sentence 2: A person wearing a bike helmet rides a bike on a path through trees.

Answer: 3


Question: Sentence 1: Two sheep on to of a cliff looking at the camera. Sentence 2: Two sheep are standing, looking at the camera, face opposite directions.

Answer:
2