Complex sentence: Macellari played an important role in the development of Burgess's literary career, being depicted as a fictional Italian photographer, Paola Lucrezia Belli, in his 1976 autobiographical novel "Beard's Roman Women", and worked as his European literary agent from 1975.
Split into simpler sentences: Macellari played an important role in the development of Burgess's literary career. She was depicted as the fictional Italian photographer Paola Lucrezia Belli in "Beard's Roman Women", his autobiographical novel from 1976, and worked as his European literary agent from 1975.