Complex sentence: Trey Ellis is also known for the small piece he wrote titled New Black Aesthetic (NBA) which describes the change in the overall image of "blackness" that has emerged in our society in the past few decades.
Split into simpler sentences: Trey Ellis is also known for the small piece he wrote titled New Black Aesthetic (NBA). This term, coined by Ellis, is a concept that describes the change in the overall image of "blackness" that has emerged in our society in the past few decades.