"Dark Knight Court" is the sixteenth episode of the 24th season of "The Simpsons" and the 524th episode overall. It originally aired on the Fox network in the United States on March 17, 2013. The episode is dedicated to Janet and Maggy Reno's brother, Robert Reno, who died of Alzheimer's disease.

Choose your answer: based on the paragraph above can we conclude that "Robert Reno was suffering from Alzheimer's disease throughout the 20th season of "The Simpsons." "?

Choose your answer from:
(1). Yes
(2). It's impossible to say
(3). No
I think the answer is
(2).