What is cultural revival and how has it played a role in U.S. American music? Give a detailed definition of this term and give two distinct examples of how or why artists have employed it. Give as much detail as applicable: artist, era, racial group, political cause, etc. Detail what culture is being revived and its roots. Then discuss in detail how the culture was revived and how it was used, including what remained the same from earlier historical moments and how it was adapted. Give specific musical examples from pieces the highlight the dynamic of cultural revival and how it plays out lyrically and sonically.