{"version":"1.0","type":"rich","title":"multi","description":"This layered scatterplot visualizes the relationship between fertility, life expectancy, and population for different clusters by country and year. The visualization uses two overlaid circle layers rendered with Vega-Lite and embedded via `vegaEmbed`. A base layer displays hollow gray circles of varying sizes to show a population size legend, while a main layer encodes cluster membership through the stroke color of additional hollow circles. The chart reads from an external `data.json` file loaded using `d3.json`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/66f808396f9f4080bef27560d0528dc9?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}