arangosh> var examples = require("org/arangodb/graph-examples/example-graph.js");
arangosh> var graph = examples.loadGraph("social");
arangosh> graph.male.save({name: "Kermit", _key: "kermit"});
{ 
  "error" : false, 
  "_id" : "male/kermit", 
  "_rev" : "816735702", 
  "_key" : "kermit" 
}
arangosh> db._exists("male/kermit")
true
arangosh> graph.male.remove("male/kermit")
true
arangosh> db._exists("male/kermit")
false