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This example combines a bar chart and a line chart to compare Harry Kane’s English Premier League goals with his market value (in millions) from 2014 to 2020. The bars represent goals on the left y-axis, while the red line traces market value on the right y-axis, both plotted against years on the x-axis. Built with React and D3 v4, it uses `d3.scaleBand` and `d3.scaleLinear` for scales, `d3.axisLeft`, `d3.axisRight`, and `d3.axisBottom` for axes, and `d3.line` to generate the path. Data comes from the CSV file `harry_kane.csv`, rendered as SVG.