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 man is diving into a swimming pool. Sentence 2: A man is singing into a microphone.

SOLUTION: 1

PROBLEM: Sentence 1: A dog in in a car. Sentence 2: A dog is biting a mop.

SOLUTION: 1

PROBLEM: Sentence 1: It would be difficult to overestimate the potential dangers of the Remote Procedure Call (RPC) vulnerability. Sentence 2: The flaw involves the Remote Procedure Call (RPC) protocol, which deals with inter-computer communications.

SOLUTION:
2