Robert Chapin has trained with which late stand-up comedian and actor from San Francisco?
Robert Chapin:  He has trained with stars such as Plácido Domingo, Robin Williams, David Hasselhoff, John Saxon, Marc Singer, Richard Grieco, Richard Lynch, Mike Norris, James Lew, Olivier Gruner, Jeff Conaway, Raye Hollitt, Tessie Santiago, and Angelica Bridges. Robin Williams: Robin McLaurin Williams (July 21, 1951 – August 11, 2014) was an American stand-up comedian and actor. Robin Williams:  Starting as a stand-up comedian in San Francisco and Los Angeles in the mid-1970s, he is credited with leading San Francisco's comedy renaissance.
Robin McLaurin Williams