Complex sentence: In 1969 Solti took up his longest-lasting appointment, as music director of the Chicago Symphony Orchestra, a post he held for 22 years, becoming the orchestra's music director laureate on his retirement in 1991.
Split into simpler sentences: In 1969 Solti was appointed music director of the Chicago Symphony Orchestra, a post he held for 22 years. He became the orchestra's music director laureate on his retirement in 1991.