This example shows a pie chart built from CSV data fetched from a remote GitHub gist. The code uses `d3.csvParse` to convert the fetched text into tabular data, then passes it to `d3.pie()` with a value accessor, which computes arc angles for each segment. A `d3.arc()` generator with zero inner radius creates the pie slices, which are colored using `d3.scaleOrdinal` with `d3.schemeCategory10`. The chart is rendered as SVG inside a pre-existing `<svg>` element, though the arcs are appended but never actually drawn in the provided code.