arangosh> db.example.remove(db.example.byExample({ name: "John Doe" }).toArray()[0]._id)
true
arangosh> db.example.toArray()
[ 
  { 
    "Hello" : "World", 
    "_id" : "example/465695627", 
    "_rev" : "465695627", 
    "_key" : "465695627" 
  }, 
  { 
    "age" : 31, 
    "name" : "Jane Smith", 
    "_id" : "example/466285451", 
    "_rev" : "466285451", 
    "_key" : "466285451" 
  } 
]