{
"_id": "P17-223",
"property": "P17",
"itemid": 223,
"labels": [
  {
    "language": "en",
    "value": "Greenland"
  },
  {
    "language": "es",
    "value": "Groenlandia"
  },
  {
    "language": "de",
    "value": "Grönland"
  }
]

DBCursor cursor = getCollection().find(query);
  BasicDBObject orderBy = new BasicDBObject("labels[0].value", 1);
  cursor.sort(orderBy);