{
  "@context": [{
    "@version": 1.1,
    "id": {"@id": "@id", "@protected": true},
    "type": {"@id" : "@type", "@container": "@set", "@protected" : true},
    "@type": {"@container": "@set", "@protected": true}
  }, {
    "@version": 1.1,
    "@type": {"@protected": true}
  }],
  "id": "http://example.com/1",
  "type": ["http://example.org/ns/Foo"]
}