This example demonstrates the process of loading external data in a React application. It fetches a CSV file containing CSS named colors from a GitHub gist and displays a summary of the dataset. The visualization shows a text-based report with the file size in kilobytes, row count, and column count. The implementation uses React's `useState` and `useEffect` hooks, with the d3 `csv` function to parse the data and `d3.csvFormat` to calculate its size.