Complex sentence: Margareta of Opole (1412/14--15 January 1454), was a Polish princess member of the House of Piast in the Opole branch and by marriage Duchess of Oława-Lubin-Chojnów.
Split into simpler sentences: Margareta of Opole (;--15 January 1454), was a Polish princess. She was a member of the Opole branch of House of Piast and by marriage a Duchess of Oława-Lubin-Chojnów.