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 dog is jumping up in the air to catch a toy. Sentence 2: A black dog jumps in the air to catch a toy.

SOLUTION: 4

PROBLEM: Sentence 1: A brown dog is in the middle of a line of dogs chasing a dirty tennis ball over dirt. Sentence 2: There are two white dogs and one brown dog chasing a ball.

SOLUTION: 3

PROBLEM: Sentence 1: I have seen UFO over Warsaw in the past. Sentence 2: Respectfully submitted, Steve I have seen UFO over Warsaw in the past.

SOLUTION:
4