{"version":"1.0","type":"rich","title":"Spiral Graph","description":"This interactive example generates a spiral graph comparing population and life expectancy trends for a user-selected country. After entering a country name, the code fetches World Bank CSV data from two GitHub gists using `d3.csv` and `Promise.all`. It renders two smoothed cardinal curves over time, with population in steel blue and life expectancy in orange, using distinct left and right y-axes. The visualization is built with D3 v7 and SVG, demonstrating data loading, merging, and custom chart construction.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/fddbdbcb0e2a4ffcb0c97aa4a3286516?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}