caption: the two - step fractioning process
exif: {"Image DocumentName": "A two-step fractionation tower", "Image ImageDescription": "Some fractions never vapourize and sink to the bottom of the tower as bitumen. This solid fraction is used to produce Asphalt.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}