{"version":"1.0","type":"rich","title":"test","description":"This example displays population changes over time for multiple countries as overlapping area charts. It loads CSV data from a GitHub gist, parses the year columns, and renders the visualization using D3 v6 APIs including `d3.scaleTime`, `d3.scaleLinear`, `d3.area`, and `d3.curveMonotoneX`. A categorical color scale assigns hues per country, with a legend positioned to the right. The SVG output is generated via a reusable chart function and D3 selection methods.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/4072053b95f4425c8e7b346e580a2f2a?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}