This pie chart (and its corresponding aria-describedby description) relies on color to differentiate data:

An example of a chart that relies on color

Pie chart description:

Orange = Apples

Blue = Lemons

Yellow = Cheeseburgers

Grey = Tobacco

Note: Hard to automatically test or detect. Requires a human tester or AI to analyze text descriptions and determine if they provide descriptive non-sensory-based descriptions for data (e.g. text descriptions).