Context: In its early years of existence, the smooth jazz format was considered to be a form of AC, although it was mainly instrumental, and related a stronger resemblance to the soft AC-styled music. For many years, artists like George Benson, Kenny G and Dave Koz had crossover hits that were played on both smooth jazz and soft AC stations.

Question: What radio station format was sometimes regarded as a type of adult contemporary?
Answer: smooth jazz

Question: What type of music was predominantly played on smooth jazz stations?
Answer: instrumental

Question: Along with Kenny G and Dave Koz, what artist was featured on smooth jazz stations?
Answer: George Benson

Question: What other format of station were smooth jazz artists sometimes featured on?
Answer: soft AC