This example visualizes the lifespan of companies by grouping them into age categories based on their incorporation and dissolution dates. The bar chart displays five age brackets (0-3, 4-7, 8-11, 12-15, and more than 15 years) with the height of each steel-blue rectangle representing the count of companies in that range. The code uses D3 v5’s `scaleBand`, `scaleLinear`, `axisLeft`, and `axisBottom` to construct and render the SVG chart from a CSV file, with company names also parsed to count term frequencies.