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.

[EX Q]: Sentence 1: Liquid ammonia leak kills 15 in Shanghai Sentence 2: Liquid ammonia leak kills at least 15 in Shanghai
[EX A]: 5

[EX Q]: Sentence 1: Egypt's opposition criticizes president's speech Sentence 2: Pakistan's opposition party boycotts presidential elections
[EX A]: 0

[EX Q]: Sentence 1: A man is pouring oil into a pan. Sentence 2: A man is pouring oil into a skillet.
[EX A]:
4