This visualization displays athlete data from the 2024 Boston Marathon, showing the raw dataset as a JSON-formatted text dump within a `<pre>` element. It uses D3 v7’s `csvParse` to load and parse the data, converting numeric string fields like `first_half`, `finish`, and `percent_change` into numbers for analysis. The visualization updates reactively via a `setState` function, triggering a re-render of the container with the newly fetched data. It demonstrates a minimal data-loading workflow without any chart or graphical encoding.