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: 2 dead, 2 injured in Nevada middle school shooting Sentence 2: Nevada: 2 dead, 2 hurt in middle school shooting

SOLUTION: 5

PROBLEM: Sentence 1: Liquid ammonia leak kills 15 in Shanghai Sentence 2: Liquid ammonia leak kills at least 15 in Shanghai

SOLUTION: 5

PROBLEM: Sentence 1: A woman is slicing a leek. Sentence 2: A woman is slicing ginger.

SOLUTION:
2