This visualization displays a hierarchical dataset of political organizations, grouped by categories such as "Armed," "Communist," and "Islam," and filtered by the years they were active. It uses a sankey diagram to show the flow from these top-level categories down to specific organization names. The code loads data from a local `data.json` file and renders it using the Google Charts Sankey package alongside D3.js (v5). The diagram is displayed in a large, wide container to accommodate the many connections between categories and individual groups.