This example loads a tab-separated dataset of daily temperatures for New York, San Francisco, and Austin, then parses it into per-city time series using `d3.tsv` and `data.columns`. The SVG canvas displays a single static text instruction, while the parsed city data is logged to the console for inspection. The code demonstrates how to reshape wide-format tabular data into nested arrays of date–value pairs, though it does not render the actual lines or axes. It uses D3 v4’s selection and data-binding methods, with an SVG viewport sized at 960 by 500 pixels.