This example demonstrates a minimal React application that fetches a remote CSV file and converts it into JSON using a custom `convertData` parser. The app renders a static "Hello React!" message, while the CSV data is asynchronously retrieved via the `fetch` API from a GitHub Gist URL. The code uses React 16.13.1 and ReactDOM, but does not yet visualize the parsed data, focusing instead on the data-processing pipeline and component scaffolding for a future visualization.