Complex sentence: He started his study with mentor and legendary jazz drummer Ed Blackwell at the Creative Music Studio in New York in 1975 and continued his relationship with Blackwell until Blackwell's death in 1992.
Split into simpler sentences: He started his music study with mentor and legendary jazz drummer Ed Blackwell at the Creative Music Studio in New York in 1975. His relationship with Blackwell continued until Blackwell's death in 1992.