Complex sentence: Like her younger brother, Augustus John, Gwen studied at the Slade School of Art (1895-98), living inexpensively by sharing living quarters with Augustus and living on a diet of nuts and fruit.
Split into simpler sentences: Like her younger brother, Augustus John, Gwen studied at the Slade School of Art (1895-98). During this period she shared living quarters with Augustus and further reduced her expenses by subsisting on a diet of nuts and fruit.