Task: Question Answering
Input (English): Passage: A few weeks after Of Human Feelings was recorded, Mwanga went to Japan to negotiate a deal with Trio Records to have the album released on Phrase Text. Trio, who had previously released a compilation of Coleman's 1966 to 1971 live performances in Paris, prepared to press the album once Mwanga provided the label with the record stamper. Coleman was also set to perform his song "Skies of America" with the NHK Symphony Orchestra, but cancelled both deals upon Mwanga's return from Japan. Mwanga immediately quit after less than four months as Coleman's manager. In 1981, Coleman hired Stan and Sid Bernstein as his managers, who sold the album's recording tapes to Island Records. He signed with the record label that year, and Of Human Feelings was released in 1982 on Island's subsidiary jazz label Antilles Records. Billboard magazine published a front-page story at the time about its distinction as both the first digital album recorded in New York City and the first digital jazz album recorded by an American label.According to jazz writer Francis Davis, "a modest commercial breakthrough seemed imminent" for Coleman, who appeared to be regaining his celebrity. German musicologist Peter Niklas Wilson said the album may have been the most tuneful and commercial-sounding of his career at that point. The album's clean mix and relatively short tracks were interpreted as an attempt for radio airplay by Mandel, who described its production as "the surface consistency that would put it in the pop sphere". Of Human Feelings had no success on the American pop charts, only charting on the Top Jazz Albums, where it spent 26 weeks and peaked at number 15. Because the record offered a middle ground between funk and jazz, McRae argued that it consequently appealed to neither demographic of listeners. Sound & Vision critic Brent Butterworth speculated that it was overlooked because it had electric instruments, rock and funk drumming, and did not conform to what he felt was the hokey image of jazz that many of the genre's fans preferred. The album later went out of print. 
Question: What is the last name person who was being managed by the man that quit after less than four months?
Output (English): Coleman.