Complex sentence: Abe built her a small studio on the roof of their apartment building where Margaret drew in charcoals under the tutelage of a young art student who eventually told her parents to leave her alone and let her develop on her own.
Split into simpler sentences: Abe built her a small studio on the roof of their apartment building. There Margaret drew in charcoals under the tutelage of a young art student who eventually told her parents to leave her alone and let her develop on her own.