{"version":"1.0","type":"rich","title":"Line Chart","description":"This line chart visualizes world population over time by region, with each region drawn as a distinct colored line on an SVG canvas. The chart uses D3 v5 APIs including `d3.scaleTime`, `d3.scaleLinear`, `d3.line` with curveBasis, and `d3.nest` to group data. Population estimates from 1950–2014 and medium-variant projections from 2015–2100 come from UN datasets loaded via `d3.csv`. A color legend using `d3.scaleOrdinal` maps regions, and a vertical line marks the year 2021, with mouse interaction logging hovered years to the console.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/99f85f6d143d47cd88857b9e687f1727?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}