This example displays a 3D scatter plot of the Iris dataset alongside a 2D scatter plot of city and state coordinates, with both traces overlaid in a single Plotly chart. It uses Plotly’s `Plotly.newPlot` to render the 2D and 3D scatter traces, while D3’s `d3.csv` loads the data from a GitHub-hosted CSV file. The visualization shows the relationship between sepal length, sepal width, and petal width for Iris samples, though the 2D trace references city and state columns, resulting in a mixed dataset presentation.