{
  "@context": {
    "dc": "http://purl.org/dc/elements/1.1/",
    "ex": "http://example.org/vocab#"
  },
  "@graph": [
    {
      "@id": "http://example.org/library",
      "@type": "ex:Library",
      "ex:contains": [{"@id":"http://example.org/library/the-republic#introduction"},{"@id":"http://example.org/library/the-republic"}]
    },
    {
      "@id": "http://example.org/library/the-republic",
      "@type": "ex:Book",
      "dc:creator": "Plato",
      "dc:title": "The Republic"
    },
    {
      "@id": "http://example.org/library/the-republic#introduction",
      "@type": "ex:Book",
            "dc:creator": "Plato"
    }
  ]
}