{"version":"1.0","type":"rich","title":"fresh block","description":"A grouped bar chart displays population structure data for Uruguay across two time periods, comparing six labeled categories (A–F) on a 0–100 scale. The chart initially shows 1950 values as white bars over a sky-blue plot area, with a yellow circular button that triggers a one-second transition to 2015 values while updating the title. Built with D3 v4, the visualization uses `d3.scaleBand` for the x-axis, `d3.scaleLinear` for the y-axis, `d3.axisBottom` and `d3.axisLeft` for ticks, and `transition().duration()` to animate bar heights and positions.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-48419ae3f97bee48cbbe52923830acfc?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}