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: He explained that he found Antetonitrus when he came to Wits in 2001 as a post-doctoral research assistant at England's University of Bristol. Sentence 2: He explained that he found antetonitrus when he came to Wits in 2001 while a post-doctoral research assistant at Bristol University in Britain.

SOLUTION: 5

PROBLEM: Sentence 1: A dog emerges form the water with a stick in its mouth. Sentence 2: A dog runs toward the camera with a stick in its mouth.

SOLUTION: 2

PROBLEM: Sentence 1: Mandela released from hospital Sentence 2: Israeli president released from hospital

SOLUTION:
1