Question: What American rapper has worked with drummer Travis Barker and fellow rapper Chamillionaire?
Sentence (from "Travis Barker discography"): Outside of his work in rock music, Barker has worked prolifically in hip hop; he was a member of the supergroup Expensive Taste and the drummer-and-DJ duo TRV$DJAM, and has released extended plays with Yelawolf, and Asher Roth and Nottz.
Relevant evidence: No