This example demonstrates a React-based data visualization that loads a CSV file of celebrities and organizes the entries into a hierarchical structure by category and gender. The code uses `d3.csv` to parse the data and `d3.nest` to group records hierarchically, transforming the result into a tree-like JSON object. React components render the visualization, with an SVG container displaying a placeholder text message. The visualization currently shows a static "Hello Pack" text rather than a chart, highlighting the integration setup between React and D3 utilities.