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: Panda's play on a swing. Sentence 2: A man is playing guitar.

SOLUTION: 1

PROBLEM: Sentence 1: Australia to scrap soaring national debt ceiling Sentence 2: Australian PM insists no argument with Indonesia

SOLUTION: 0

PROBLEM: Sentence 1: The puppy played with a blue tennis ball. Sentence 2: A puppy is playing with a tennis ball.

SOLUTION:
4