{"version":"1.0","type":"rich","title":"Multiple Instances","description":"Two interactive line charts display monthly water level measurements for two wells, sharing a synchronized brush. The upper chart shows the full dataset, while the lower chart's brush selection filters the time domain of the upper chart via `d3.brushX` and `event.selection`. Both use `d3.line`, `d3.nest`, and `d3.scaleTime` to render multiple colored series per well, with data loaded from a CSV. The `brushChart` function is instantiated twice in `index.js`, demonstrating reusable chart components.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/9187995c7b0246db8f75858f5b47f0c5?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}