This example visualizes revenue distribution from Umsatz (total revenue) through Spotify Premium and Free Version tiers to Labels, Publishers, Distributors, and finally Artists. The Sankey diagram uses colored nodes and curved links with hover effects to show flow magnitudes. It relies on the D3.js library version 3.5.17, implementing a custom `d3.sankey` layout function that computes node positions and link depths. Data comes from `sankeydata.json`, with rendering handled via SVG and styled through external CSS.