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: Usain Bolt wins 200m – Steven Howard reaction Sentence 2: Facebook mobile gains drive revenue growth: reaction

SOLUTION: 0

PROBLEM: Sentence 1: A black and white photo of a woman showing a horse. Sentence 2: a black and white photo of cows in their stalls.

SOLUTION: 1

PROBLEM: Sentence 1: Two different breeds of brown and white dogs play on the beach. Sentence 2: Two dogs playing in the sand at the beach.

SOLUTION:
4