{"version":"1.0","type":"rich","title":"Temperature in multiple cities","description":"This interactive line chart displays population trends for multiple countries over time, with a color-coded legend identifying each nation and a vertical line marking a user-selectable year. Built using D3 v5, it leverages `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and `line` with `curveBasis` to render smoothed paths. Data is loaded from UN population CSV files, and hovering over the chart updates the selected year to show values at that point.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/1b8b31829ad6477890d01a1723987598?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}