arangosh> db.example.insert({ Hello : "World" });
{ 
  "_id" : "example/485215475", 
  "_rev" : "485215475", 
  "_key" : "485215475" 
}
arangosh> db.example.insert({ Hello : "World" }, true);
{ 
  "_id" : "example/485412083", 
  "_rev" : "485412083", 
  "_key" : "485412083" 
}