Correct code

{
  "@context": "https://schema.org",
  "@graph": {
    "@type": "Article",
    "headline": "How Speech Shifts With Aspirations in SEA | Quantum Consumer Solutions",
    "description": "Read this article to explore how aspirations shape speech patterns in Southeast Asia. Discover the dynamic linguistic transformations reflecting cultural ambitions.",
    "image": {
      "@type": "ImageObject",
      "url": "https://unsplash.com/photos/5kS-6zE1KYQ"
    },
    "author": {
      "@type": "Person",
      "name": "Quantum Consumer Solutions"
    },
    "publisher": {
      "@type": "Organization",
      "name": "Quantum Consumer Solutions",
      "logo": {
        "@type": "ImageObject",
        "url": " https://quantumcs.com/wp-content/uploads/2021/07/cropped-Quantum-Logo-Colour.png",
        "width": "512",
        "height": "512"
      }
    },
    "datePublished": "2023-06-21",
    "dateModified": "2023-06-21"
  }
}