{
  "@context": {
    "ex": "http://example.org/vocab#"
  },
  "@id": "http://example.org/test",
  "ex:test": { "@value": "test",  "@language": "en" },
  "ex:drop-lang-only": { "@language": "en" },
  "ex:keep-full-value": { "@value": "only value" }
}