This example shows a small social network of nine people connected by weighted links, with node labels displayed beside each circle. The graph uses a force-directed layout via `d3.layout.force` to position nodes, and link thickness is scaled by the square root of the weight value from the JSON data. Nodes are rendered as SVG circles and text, with drag interaction enabled through `force.drag`. The visualization reads its graph structure from `graph.json` and applies simple styling for green circles and blue labels.