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: South Africa president: Mandela is improving Sentence 2: Afghan president delays signing US deal

SOLUTION: 0

PROBLEM: Sentence 1: The skinny cows are standing on the grass. Sentence 2: The white ducks are standing on the ground.

SOLUTION: 1

PROBLEM: Sentence 1: Breathe In, Breathe Out, Move On. Sentence 2: buwhahahaha Breathe In, Breathe Out, Move On.

SOLUTION:
4