This pie chart visualizes the availability of an unspecified resource, as recorded in a remote CSV file hosted on GitHub Gist. It breaks down the dataset by the "available" field, showing proportional counts for each status value. The chart is built using D3 v7, leveraging `d3.csv`, `d3.group`, `d3.pie`, and `d3.arc` to process the data and generate SVG arcs. A categorical color scale from `d3.schemeCategory10` colors each slice, and a manually positioned legend lists each category with its count.