TASK DEFINITION: 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.
PROBLEM: Sentence 1: Andy Murray deserves knighthood, David Cameron says Sentence 2: David Cameron: Andy Murray deserves a knighthood

SOLUTION: 5

PROBLEM: Sentence 1: A man is rapidly chopping some mushrooms using a knife. Sentence 2: A person is quickly chopping mushrooms with a knife.

SOLUTION: 4

PROBLEM: Sentence 1: A clear plastic chair in front of a bookcase. Sentence 2: a clear plastic chair in front of book shelves.

SOLUTION:
4