This example visualizes a small social network of eight individuals, dividing them into two distinct groups. It shows the connections between people as yellow lines, with line thickness proportional to the strength of the relationship. Nodes are rendered as brown rectangles with text labels, and the entire graph is positioned using a force-directed layout that users can interact with by dragging nodes. The visualization uses D3.js v4 and v2 APIs, specifically `d3.layout.force()` for the simulation and `d3.json()` to load the network data from a JSON file.