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A: Did you hear that Thomas Green was knighted by the Queen of England last week?
B: That's quite an achievement.
Question: What should we call Thomas Green now?
(1)Man of the year. (The Man in the Moon? )
(2)Sir Thomas Green.
(3)Mr. Thomas Green.
(4)Duke Thomas Green.
I don't who's who. But then how can I make a good guess?