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.
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Question: Sentence 1: Iraq Backs Egypt Crackdown on Morsi Supporters Sentence 2: Iraq backs Egypt crackdown on Mohamed Morsi supporters

Answer: 5


Question: Sentence 1: Man riding a bicycle down a narrow path. Sentence 2: A man riding a unicycle down a paved road

Answer: 3


Question: Sentence 1: Gunman Among 7 Dead After Florida Apartment Shooting Sentence 2: Gunman among 7 dead after Fla. apartment shootout

Answer:
5