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.

Q: Sentence 1: Residents return to Texas blast site Sentence 2: Residents return to Fallujah

A: 0
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Q: Sentence 1: View of a living room with a dining room in the background. Sentence 2: A living room with large sofas and a dining table in the background.

A: 4
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Q: Sentence 1: general nikolai n. urakov stated by telephone that the state scientific center of applied microbiology has quite reliable systems of protection in case of emergency. Sentence 2: general nikolai n. urakov is the longtime director of the the state scientific center of applied microbiology.

A:
2
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