{"version":"1.0","type":"rich","title":"Graph with four lines","description":"This chart displays the allocated and unallocated telescope time for three instruments (IRSF, 1.9-m, and 1.0-m) using stacked bars. Each subgroup is represented by color, with a legend showing red for allocated and blue for unallocated time. The D3 v5 code uses `d3.stack` to build the layered series, `d3.scaleBand` and `d3.scaleLinear` for positioning, and `d3.axisBottom` and `d3.axisLeft` for the axes. Data is loaded from a CSV file via `d3.csv`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/c65fa81f7dc84716bb018dad7186e881?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}