Complex sentence: Mori entered the "Escuela de Bellas Artes" (School of Fine Arts) at the University of Chile in 1914 and in 1920 he joined the great gathering of artists in the Montparnasse Quarter in Paris, France.
Split into simpler sentences: Mori entered the "Escuela de Bellas Artes" (School of Fine Arts) at the University of Chile in 1914. In 1920 he joined the great gathering of artists in the Montparnasse Quarter in Paris, France.