Complex sentence: But such a reading equates Burgess with Mozart, the teacher, and Dickinson with Beethoven, his student, although, as Driscoll points out, it was Burgess who was called Beethoven by school mates, friends, and colleagues.
Split into simpler sentences: But such a reading equates Burgess with Mozart, the teacher, and Dickinson with Beethoven, his student. The difficulty is, as Driscoll points out, that it was Burgess who was called Beethoven by school mates, friends, and colleagues.