In this task, you are given a sentence in the English language and your task is to convert it into the Japanese language. In translation, keep numbers as it is and make it sentence case (capitalize only the first word of each sentence and noun).

Oprah Winfrey has announced that she will retire from her talk show on September 9, 2011, during season 25.
オプラ・ウィンフリーは、第25シーズン中の2011年9月9日に、トークショーから引退すると発表した。