{"version":"1.0","type":"rich","title":"World Countries Tree","description":"A yellow circle face with animated eyebrows demonstrates D3 v4 transitions. The face is drawn with SVG circles, rectangles, and an arc-based mouth, centered via a transformed group. Eyebrows move up and down using chained `transition().duration(2000)` calls that toggle their vertical offset. The code uses D3's `select`, `arc`, and transition API on static SVG elements, with no data binding or force simulation.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/2b7872a2762c47a582b5e49b9a7d2a45?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}