def _edgeLabel(self, node, parent):
        """Helper method, returns the edge label between a node and it's parent"""
        return self.word[node.idx + parent.depth : node.idx + node.depth]
def _edgeLabel(self, node, parent):
        
        return self.word[node.idx + parent.depth : node.idx + node.depth]
def _edgeLabel ( self , node , parent ) : return self . word [ node . idx + parent . depth : node . idx + node . depth ]
Helper method, returns the edge label between a node and it's parent
Helper method returns the edge label between a node and it s parent