{"version":"1.0","type":"rich","title":"Project Momentum v2","description":"This visualization presents a pie chart of LEGO sets grouped by theme, using nested arcs to compare price tiers within each category. The chart employs D3.js APIs including `d3.pie`, `d3.arc`, and `d3.scaleOrdinal` to render three concentric rings per slice, showing counts of sets under $50, under $100, and all sets. Labels and connector lines are positioned using arc centroid calculations. The data comes from the `lego-csv` package.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/0fd4095dfbfa4dbc94a7b0b6a9d6b85e?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}