{
  "@context": "https://schema.org",
  "@type": "WebPage",
  "name": "Page Not Found",
  "description": "The page you requested could not be found. The site returned a 'Page not found' (404) message instead of the expected content.",
  "publisher": {
    "@type": "Organization",
    "name": "Unknown Publisher"
  },
  "mainEntity": {
    "@type": "WebPageElement",
    "name": "404 Error",
    "description": "The page you requested could not be found. The site returned a 'Page not found' (404) message instead of the expected content."
  },
  "breadcrumb": {
    "@type": "BreadcrumbList",
    "itemListElement": [
      {
        "@type": "ListItem",
        "position": 1,
        "name": "Home"
      },
      {
        "@type": "ListItem",
        "position": 2,
        "name": "Page Not Found"
      }
    ]
  }
}