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: A girl in a pink shirt is sprawling her limbs out in midair. Sentence 2: A man dressed in a Santa suit is climbing up a large concrete building.

SOLUTION: 0

PROBLEM: Sentence 1: Residents return to Texas blast site Sentence 2: Residents return to Fallujah

SOLUTION: 0

PROBLEM: Sentence 1: UN report says both sides in Syria abuse rights Sentence 2: NATO leader plays down risk of Turkey-Syria clash

SOLUTION:
1