Complex sentence: Basilio reveals to them that he imprisoned his infant son, Segismundo, due to a prophecy by an oracle that the prince would bring disgrace to Poland and would kill his father, but he wants to grant his son a chance to prove the oracle wrong.
Split into simpler sentences: Basilio reveals to them that he imprisoned his infant son, Segismundo, due to a prophecy by an oracle that the prince would bring disgrace to Poland and would kill his father. Yet, he wants to grant his son a chance to prove the oracle wrong.