question: Along with Trey Songz , Patti LaBelle , Toni Braxton , Whitney Houston , Aretha Franklin , Frank Ocean , Craig David and Mariah Carey , who is a well-known urban AC artist ?
answer: Luther Vandross
turker_answer: Along with Trey Songz , Patti LaBelle , Toni Braxton , Whitney Houston , Aretha Franklin , Frank Ocean , Craig David and Mariah Carey , Luther Vandross is a well-known urban AC artist .
rule-based: Along with Trey Songz , Patti LaBelle , Toni Braxton , Whitney Houston , Aretha Franklin , Frank Ocean , Craig David and Mariah Carey , Luther Vandross is a well-known urban AC artist .