Complex sentence: In 1316, Joan, the only surviving child of Louis X of France was debarred from the throne in favor of her uncle, Philip, Count of Poitiers, after which it was declared that women could not inherit the French throne.
Split into simpler sentences: In 1316, Joan, the only surviving child of Louis X of France was debarred from the throne in favor of her uncle, Philip, Count of Poitiers. After this it was declared that women could not inherit the French throne.