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: X'mas cruise passengers hit by Norovirus Sentence 2: Missing cruise passenger is a NSW ambo
[A]: 0


[Q]: Sentence 1: Zimmerman says that he was sucker punched by his car. Sentence 2: His "friends" say that he was confronted by his car.
[A]: 2


[Q]: Sentence 1: A small bird perched on an icy branch. Sentence 2: A yellow bird perched on a branch.
[A]:
3