Complex sentence: In 1914 Berni became the apprentice of Catalan craftsman N. Bruxadera at the "Buxadera and Co." stained glass company, and later studied painting at the Rosario Catalá Center.
Split into simpler sentences: In 1914 Berni became an apprentice of N. Bruxadera, a Catalan craftsman, at the "Buxadera and Co." stained glass company. He also studied painting at the Rosario Catalá Center.