Complex sentence: A childhood neighbor first seen meticulously cutting the front lawn while being berated by his mother, eventually seen visiting the same psychiatric doctor's office that the young John Dolan Vincent went to for treatment of his headaches.
Split into simpler sentences: A childhood neighbor to Vincent, first seen meticulously cutting the front lawn while being berated by his mother. Eventually he is found to be visiting the same psychiatric doctor's office that the young John Dolan Vincent went to for treatment of his headaches.