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 playing a flute. Sentence 2: A man is playing a bamboo flute.

SOLUTION: 4

PROBLEM: Sentence 1: Fallen US firefighters brought home Sentence 2: Wall Street ends slightly lower

SOLUTION: 0

PROBLEM: Sentence 1: Man standing on top of jagged rocks near the ocean. Sentence 2: A man is standing on top of rocks overlooking the ocean.

SOLUTION:
5