user
Given a cartoon image and a caption. Caption: Forget Oregon. I'm going to Vegas. Question: Generating an explanation of why this image/caption combination is funny. Answer: 
assistant
A joke about the Oregon trail being diverted to Las Vegas. Settlers moving from the east to the west coast on wagons usually ended in Oregon, but these settlers are distracted by the lights and glamour of Las Vegas. The depicted spotlights depicted are commonly found in Vegas, which has lots of tourist activities and amenities, and is along the way. The joke is funny in part because modern Las Vegas didn't exist at the time of the Oregon Trail, and so this couldn't have happened.