arangosh> var examples = require("org/arangodb/graph-examples/example-graph.js");
arangosh> var graph = examples.loadGraph("social");
arangosh> graph.relation.save("male/bob", "female/alice", {type: "married", _key: "bobAndAlice"});
{ 
  "error" : false, 
  "_id" : "relation/bobAndAlice", 
  "_rev" : "1013507703", 
  "_key" : "bobAndAlice" 
}