caption: A straight line is 180 degrees
exif: {"Image DocumentName": "A straight line is 180 degrees", "Image ImageDescription": "Angle names. Straight angle. A straight line is 180 degrees.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}