{
  "@context": {
    "mylist1": {"@id": "http://example.com/mylist1", "@container": "@list"},
    "mylist2": {"@id": "http://example.com/mylist2", "@container": "@list"},
    "myset1": {"@id": "http://example.com/myset1", "@container": "@set" },
    "myset2": {"@id": "http://example.com/myset2", "@container": "@set" },
    "myset3": {"@id": "http://example.com/myset3", "@container": "@set" }
  },
  "@id": "http://example.org/id",
  "mylist1": [],
  "myset1": { "@set": [] },
  "myset2": [ { "@set": [] }, [], { "@set": [ null ] }, [ null ] ],
  "myset3": [ { "@set": [ "hello", "this" ] }, "will", { "@set": [ "be", "collapsed" ] } ]
}