This example visualizes the relationships between arts organizations and their affiliated projects using a force-directed graph. It shows four main parent nodes connected by links, each with child nodes and leaf nodes that represent smaller entities. The visualization uses d3.forceSimulation with forceManyBody, forceLink, and forceCenter to compute layout positions, and renders circles and lines as SVG elements. Node colors and sizes are defined in a separate data module, and nodes can be dragged interactively using d3.drag.