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: Obama nominates new transportation secretary Sentence 2: Obama To Meet Embattled Veterans Secretary

A: 0
****
Q: Sentence 1: Andy Murray deserves knighthood, David Cameron says Sentence 2: David Cameron: Andy Murray deserves a knighthood

A: 5
****
Q: Sentence 1: British Airways' New York-to-London runs will end in October. Sentence 2: British Airways plans to retire its seven Concordes at the end of October.

A:
2
****