This network graph visualizes relationships between entities, where each node represents an entity and each link represents a connection type such as "General Practice," "Gastroenterology," or "Physiotherapy." The graph uses a force-directed layout, with nodes simulated using `d3.forceSimulation`, including link, charge, and center forces. Nodes are colored by group and rendered as circles with labels, while links are drawn as lines. The graph supports interactive dragging via `d3.drag`, and data is loaded from a JSON file using `d3.json`.