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: Two people are riding a motorcycle. Sentence 2: Two people are riding a bike.

SOLUTION: 2

PROBLEM: Sentence 1: A little white curly haired dog runs across the pavement with a stick in its mouth. Sentence 2: A white curly haired dog runs with a stick in it's mouth.

SOLUTION: 5

PROBLEM: Sentence 1: The little boy is singing and playing the guitar. Sentence 2: A baby is playing a guitar.

SOLUTION:
3