Find a chart in a newspaper, report, magazine, leaflet or poster, photograph it straight on with axis labels readable; digital screenshots and unreadable labels are rejected. Chart types, languages and sources are uncontrolled, so the set is the distribution of printed charts in circulation across Southeast Asia, the United States, Europe and beyond, and values are usually legible enough to transcribe for chart QA. Chart-understanding datasets are clean, perfectly aligned digital renders; a chart photographed from an annual report or a newspaper has paper texture, uneven light, perspective skew and halftone printing, and accuracy drops accordingly. The figures reproduce published charts, so treat use as research and evaluation unless your rights review says otherwise.