{
  "@context": {
    "eg": "http://example.org/vocab#",
    "eg:p": {"@type": "@id"}
  },
  "@graph": [
    {
      "@id": "_:b1",
      "eg:p": [
        "_:b2"
      ]
    },
    {
      "@id": "_:b2",
      "eg:p": [
        "_:b3"
      ]
    },
    {
      "@id": "_:b3",
      "eg:z": [
        "foo1",
        "foo2"
      ]
    },
    {
      "@id": "_:c1",
      "eg:p": [
        "_:c2"
      ]
    },
    {
      "@id": "_:c2",
      "eg:p": [
        "_:c3"
      ]
    },
    {
      "@id": "_:c3",
      "eg:z": [
        "bar1",
        "bar2"
      ]
    }
  ]
}