{
  "@context": {
    "@version": 1.1,
    "@base": "http://example.com/",
    "@vocab": "http://example.com/",
    "author": {"@type": "@vocab", "@container": "@index", "@index": "prop"},
    "prop": {"@type": "@id"}
  },
  "@id": "article",
  "author": {
    "regular": {"@id": "person/1", "prop": "foo"},
    "guest": [
      {"@id": "person/2", "prop": "foo"},
      {"@id": "person/3", "prop": "foo"}
    ]
  }
}