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: Nokia apologises for 'faked' ad Sentence 2: US waives riders for Pak aid

SOLUTION: 0

PROBLEM: Sentence 1: A dog is jumping up in the air to catch a toy. Sentence 2: A black dog jumps in the air to catch a toy.

SOLUTION: 4

PROBLEM: Sentence 1: A puppy is repeatedly rolling from side to side while on its back. Sentence 2: A dog is rolling from side to side.

SOLUTION:
4