user
Given a cartoon image and a caption. Caption: Five hundred billion galaxies and nothing’s on. Question: Generating an explanation of why this image/caption combination is funny. Answer: 
assistant
A joke about not being able to find a TV show to watch. Sometimes, people will complain that there's nothing interesting on TV, despite there being many channels available. But here, the entire galaxy is in their living room (as a stand-in for the multitude of channels). It's funny because the scale of the options they have is the entire universe, and yet, they are bored by it all.