Complex sentence: The Clinic was initially funded through proceeds of benefit concerts, many of which were organized by Bill Graham, the first of which took place on July 13,1967 at the Fillmore Auditorium in San Francisco, CA.
Split into simpler sentences: The Clinic was initially funded through proceeds of benefit concerts, many of which were organized by Bill Graham. The first of such benefit concerts took place on July 13,1967 at the Fillmore Auditorium in San Francisco, CA.