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This example shows a single yellow circle with a black outline centered in an SVG canvas. The visualization is built with React and rendered as SVG, using the `ReactDOM` API to mount the component. The circle is drawn with a radius of 245 pixels on a 960 by 500 canvas, demonstrating basic SVG shapes and styling within a React framework. The code imports React and ReactDOM, and the package includes D3 as a dependency, though no D3 functions are used here.