Complex sentence: Phalanx was where Kandinsky met Gabriele Münter, an art student of the school, she was to become his pupil, intimate companion, and critic until they separated in 1914.
Split into simpler sentences: Phalanx was where Kandinsky met Gabriele Münter, an art student at the school. She was to become his pupil, intimate companion, and critic until they separated in 1914.