Correct code

{
  "@context": "https://schema.org",
  "@graph": [
    {
      "@type": "Place",
      "@id": "https://www.houstononthecheap.com/#place"
    },
    {
      "@type": "NewsMediaOrganization",
      "@id": "https://www.houstononthecheap.com/#organization"
    },
    {
      "@type": "WebSite",
      "@id": "https://www.houstononthecheap.com/#website"
    },
    {
      "@type": "CollectionPage",
      "@id": "#webpage",
      "url": "https://www.houstononthecheap.com/news/things-to-do-in-houston-this-weekend-free-events-activities-couples-near-me/",
      "name": "Things to Do in Houston this Weekend",
      "isPartOf": { "@id": "https://www.houstononthecheap.com/#website" },
      "inLanguage": "en-US",
      "description": "Discover the Best Free and Cheap events in Houston this weekend. Find festivals, family fun, date night ideas, food and drink specials, and more — updated weekly.",
      "mainEntity": {
        "@type": "ItemList",
        "itemListElement": [
          {
            "@type": "ListItem",
            "position": 1,
            "item": {
              "@type": "Event",
              "name": "Event Title (e.g., Houston Art Car Parade)",
              "url": "https://www.event-organizer.com/parade-details"
            }
          },
          {
            "@type": "ListItem",
            "position": 2,
            "item": {
              "@type": "Event",
              "name": "Another Event Title (e.g., Free Museum Day)",
              "url": "https://www.museum-site.com/free-day"
            }
          }
        ]
      }
    }
  ]
}