def tripleProductionData():
'''
Return data corresponding to a tree (root-0)--dep-->(child-1)
'''
root = DependenciesTree("root-0")
child = DependenciesTree("child-1",dependency="dep",parent=root)
root.child = [child]
nodeToID = {root:0, child:1}
bt = TriplesBucket()
return (root,nodeToID,bt)
