Complex sentence: COYO is in its 26th season (2011--12) since it began in 1986 under the direction of Music Director Jahja Ling, who then served as Music Director of COYO for six seasons.
Split into simpler sentences: COYO is in its 26th season (2011--12) since it began in 1986 under the direction of Music Director Jahja Ling. Ling served as Music Director of COYO for six seasons.