caption: an image of a problem solving some problem that could solve the problem in this lesson
exif: {"Image DocumentName": "What\u2019s the solution?To solve this problem, we need a way to choose the most informative training examples.", "Image ImageDescription": "This requires some way of sorting  s by how informative they are for classification. So, where do we start?", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}