{
  "@context": {
    "ex": "http://example.com/",
    "@vocab": "http://xmlns.com/foaf/0.1/"
  },
  "@graph": [
    {
      "@id": "ex:alice",
      "@type": "Person",
      "name": "Alice",
      "knows": {
        "@id": "ex:bob"
      }
    },
    {
      "@id": "ex:bob",
      "@type": "Person",
      "name": "Bob",
      "knows": {
        "@id": "ex:alice"
      }
    }
  ]
}