Complex sentence: María Iturbi married Stephan Hero, an American concert violinist who had been one of her father's protégés in 1936; they had two daughters, Maria Antonia and Maria Theresa, before separating in 1939.
Split into simpler sentences: María Iturbi married Stephan Hero, an American concert violinist who had been one of her father's protégés in 1936. They had two daughters, Maria Antonia and Maria Theresa, before separating in 1939.