Complex sentence: On April 26 1709, Marie Louise was married to John William Friso, Prince of Orange, who was a son of Prince Henry Casimir II of Nassau-Dietz and Henriëtte Amalia van Anhalt-Dessau.
Split into simpler sentences: On April 26 1709, Marie Louise was married to John William Friso, Prince of Orange. He was a son of Prince Henry Casimir II of Nassau-Dietz and Henriëtte Amalia van Anhalt-Dessau.