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Given a cartoon image and a caption. Caption: It’s the new Mustang. Question: Generating an explanation of why this image/caption combination is funny. Answer: 
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A play on the term "mustang." A new mustang, in the modern world, refers to the Ford Mustang, which is a type of car. But, mustang is also a type of horse. Here, the cowboy's new mustang is an upgraded type of mechanical horse, which intersects both interpretations.