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: A girl playing is a pile of colorful balls. Sentence 2: A little girl plays in a pit of colorful balls.

SOLUTION: 5

PROBLEM: Sentence 1: A big turtle is walking. Sentence 2: The tortoise is walking.

SOLUTION: 4

PROBLEM: Sentence 1: A dog sat at the counter of a store. Sentence 2: The dog is standing at the counter.

SOLUTION:
3