caption: Representation for Not a Number
exif: {"Image DocumentName": "Representation for Not a Number", "Image ImageDescription": "What is sqrt(-4.0)or 0/0? If \u221e not an error, these shouldn\u2019t be either. Called Not a Number (NaN) Exponent = 255, Significand nonzero. Why is this useful? Hope NaNs help with debugging? They contaminate: op(NaN, X) = NaN.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}