Complex sentence: Joanna of Armagnac (24 June 1346-1387) was a French noblewoman of the powerful Armagnac family, being the eldest daughter of John I of Armagnac and his wife Beatrice of Clermont.
Split into simpler sentences: Joanna of Armagnac (24 June 1346-1387) was a French noblewoman of the powerful Armagnac family. She was the eldest daughter of John I of Armagnac and his wife Beatrice of Clermont.