of the `<body>` element, or any element with an explicit `"banner"` role is a type of ARIA landmark region that identifies site-oriented content at the beginning of the page. When the page includes more than one banner region, each should have a unique label, so people who use assistive technologies can quickly identify and navigate to each `"banner"` region.

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### What to do

* For each `<header>` element that is a descendant o