JSON-LD for Web page with additional types using schema.org

gistfile1.txt

<script type="application/ld+json">
{
    "@context": "http://schema.org",
    "@type": "WebPage",
    "name": "Title of web page",
    "description": "Description of web page",
    "additionalType": [
        {
          "@id": "http://dbpedia.org/page/Navajo"
        },
        {
          "@id": "http://dbpedia.org/page/Arapaho"
        }
      ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/us/deed.en_US"
}
</script>