This example visualizes temperature data from San Francisco over time, showing a smooth line chart with overlaid circular markers for each data point. The line is drawn using `d3.line` with `curveBasis` for interpolation, while `d3.scaleTime` and `d3.scaleLinear` map timestamps and temperature values to the SVG canvas. Axes are generated with `d3.axisLeft` and `d3.axisBottom`, and data is loaded asynchronously via `d3.csv` from an external dataset. The SVG rendering includes styled grid lines, axis labels, and a title.