{"version":"1.0","type":"rich","title":"Assignment_2","description":"This example combines a stacked area chart of country population changes across eight census years and a pie chart of fictional product sales. The area chart uses `d3.stack`, `d3.scaleBand`, and `d3.area` to layer annual population data by country, with axis labels and per-layer value text rendered via SVG. The pie chart applies `d3.pie` and `d3.arc` to sales quantities, adding a legend with color-coded rects and labels. Both visualizations load CSV data asynchronously and render using SVG elements.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/179688b7b6534f9f91d0140db74d84a7?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}