Complex sentence: Malvina Hoffman was born in New York City, the daughter of the concert pianist and composer, Richard Hoffman and Fedelia Marshall Lamson Hoffman, who presided over her education at home until she was 10 years of age.
Split into simpler sentences: Malvina Hoffman was born in New York City, the daughter of the concert pianist and composer, Richard Hoffman and Fedelia Marshall Lamson Hoffman. Her mother, also a pianist, presided over her education at home until she was 10 years of age.