Complex sentence: Joe Harriott (1928-1973) was a Jamaican jazz alto saxophonist, initially a bebopper but now widely aknowledged as one of the worldwide pioneers of free jazz.
Split into simpler sentences: Joe Harriott (1928-1973) was a Jamaican jazz musician who played the alto saxophone. Initially a bebopper, he is now widely aknowledged as one of the worldwide pioneers of free jazz.