This example displays multi-series car manufacturer sales data as a 3D bar chart, with each manufacturer broken down across the first six months of the year. The visualization loads a CSV file containing the car data and renders it using the `d3-x3d` library, which translates D3.js selections into X3D scenes displayed through the X3DOM runtime. The code uses `d3.csv` to parse the data and `d3.x3d.chart.barChartMultiSeries()` to generate the three-dimensional bars, with the chart embedded in a div selected via `d3.select`. The chart is built with D3 v5 and the d3-3d plugin for 3D layout.