Question: In what year was the single that Kuk Harrell won his fourth Grammy for producing released?
Sentence (from "Kuk Harrell"): Earning his fourth Grammy for the vocal production of Rihanna's No. 1 Billboard Single "Only Girl (In the World)", Harrell is also the vocal producer and co-writer of Rihanna's Grammy-winning single "Umbrella".
Relevant evidence: Yes