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: The baby is laughing and crawling. Sentence 2: A baby is laughing and crawling on the floor.

SOLUTION: 4

PROBLEM: Sentence 1: Thai opposition protesters begin Bangkok shutdown Sentence 2: Thai protesters launch Bangkok 'shutdown'

SOLUTION: 5

PROBLEM: Sentence 1: Two Aust soldiers wounded in Afghanistan Sentence 2: 4 foreign soldiers killed in Afghan east

SOLUTION:
1