“How many Alzheimer’s patients does it take to change a lightbulb?”/“To get to the other side!”

“Why did the chicken cross the road?”/“To get to the other side” is a classic riddle from the 19th century. Another popular riddle is the “lightbulb joke,” asking how many of a certain type it takes to change a light bulb. A popular Alzheimer’s joke confuses these two types of jokes.
 
This joke was posted on Twitter by Ben on May 8, 2008:
 
Q: How many Alzheimer’s patients does it take to change a lightbulb?
A: To get to the other side.

   
The joke has been printed on many images.
 
     
Google Groups: rec.humor
wanted: alzheimers jokes
ima pseudonym
5/29/95
Q: How many alzheimer’s patients does it take to change a lightbulb?
A: I give up, how many?
Q:  Sorry, what was the question?
       
Twitter 
Ben
@dreameruk
How many Alzheimers patients does it take to change a lightbulb? To get to the other side.
8:47 AM - 8 May 2008
 
Twitter     
Lloyd 🇪🇺  🏴󠁧󠁢󠁷󠁬󠁳󠁿
@Lloyd
How many Alzheimer’s patients does it take to change a lightbulb?
To get to the other side. #140-char-joke
12:45 PM - 14 Jan 2009
     
Twitter
Graham Delorean
@Boots__electric
Q.How many alzheimers patients does it take to change a lightbulb? A.to cross the road!
3:34 AM - 21 Apr 2009
 
Twitter
Darragh Doyle
@darraghdoyle
How many Alzheimer’s patients does it take to change a lightbulb? To get to the other side. #doylejoke
11:51 AM - 24 Apr 2009
   
Twitter
Jake Rodriguez-Gonzales
@JakeGonzales
[Q. How many Alzheimer’s patients does it take to screw in a lightbulb?][A. To get to the other side.] - ‘Anon’
10:38 AM - 29 Apr 2009
 
Reddit—Jokes
How many alzheimer’s patients does it take to change a lightbulb?
submitted July 19, 2011 by Madonski
To get to the other side!
 
Reddit—Jokes
How many Alzheimer’s patients does it take to change a light bulb?
submitted August 21, 2011 by fobbymaster
To get to the other side!
         
Google Groups: rec.arts.sf.written
Re: computer bootlaces: First SF?
Charlie Gibbs
9/20/11
(...)
Q: How many Alzheimer’s patients does it take to change a light bulb?
A: To get to the other side.
 
Reddit—Jokes
How many Alzheimer’s patients does it take to change a light bulb?
submitted April 29, 2012 by El_Poyo_Loco
To get to the other side
 
Reddit—Jokes
How many Alzheimer’s patients does it take to change a lightbulb?
submitted February 6, 2017 by Heiad
To get to the other side
   
Reddit—AntiAntiJokes
How many Alzheimer’s patients does it take to get to the other side? (self.AntiAntiJokes)
submitted September 17, 2018 by Drachma10
i fucked up the punchline…
 
Reddit—Jokes
How many Alzheimer’s patients does it take to screw in a light bulb?
submitted October 10, 2018 by TaintDozer
To get to the other side