What is the fine-grained topic of the following text: William has shared the stage with and recorded with award winning and renowned musicians from around the world including Dorothy Norwood, Ben Tankard, Luis Conte, Alberto Salas, Eric Lige, Vahagn Stepanyan, Eric Moore ii, Aaron Spears, Josh Baldwin, Ramon Stagnaro, Mister G, KJ Scriven, Melvin Lee Davis, Darwin Hobbs, Morris Mingo, Tavarius ‘Varo’ Johnson, J. David Bratton, Kenneth ‘Kaybass’ Diggs, Scott Coats, CS Cleverson, Giles Blankenship, Marvin Winans, Don Potter, Stephen Roach, Phil Routszong, Frank Fluker, Tony Murnahan, Suzy Yarai, Michael Parlett, Josh Davis, Nikki Lerner, and many more. Only return the topic.
William's collaborations with renowned musicians