Question: Sir Nolan has worked with what sibling musical group signed to Republic Nashville in August 2009?
Sentence (from "Sir Nolan"): He has worked with notable artists such as Nick Jonas, Selena Gomez, Demi Lovato, Justin Bieber, Lil Wayne, Jason Derulo, Enrique Iglesias, Kelly Clarkson, Pitbull, Chris Brown, Poppy, Christina Aguilera, Magic, The Wanted, Rita Ora, Dan + Shay, Lady Antebellum, The Band Perry and many more.
Relevant evidence: Yes