Answer the following question: Question: What were the three sons dealing with? If there is no answer, please output "Insufficient information to provide an answer.". Movie title: Ran Context: Akira Kurosawa's treatment of King Lear, with three sons dealing with the passing of an era as their warlord father Lord Hidetora Ichimonji (Tatsuya Nakadai), tries to find peace in his last years by dividing his fief among them. While one honest son, Saburo Naotora Ichimonji (Daisuke Ryu), faces his family's wrath for speaking the truth, his two brothers, Taro Takatora Ichimonji and Jiro Masatora Ichimonji (Akira Terao, Jinpachi Nezu) vie for power in the vacuum left by Hidetora's retirement. While Kyoami the Court Fool (Peter) makes wise commentary, Hidetora discovers for himself the madness caused by his thirst for power, and tries to find redemption for his deadly past.
Answer:
the passing of an era