user
Given a cartoon image and a caption. Caption: It could be a combination of things. Question: Generating an explanation of why this image/caption combination is funny. Answer: 
assistant
A play on the term "combination of things" --- doctors often have difficulty finding the cause of symptoms because their causes can be caused by multiple factors, i.e., a combination of things. But here, the patient is a combination safe, which is unlocked by a literal combination.