Distinct(Project(Extend(Extend(Extend(LeftJoin(LeftJoin(LeftJoin(BGP( ?classification <https://w3id.org/i40/sto#isDescribedin> ?initiative .
                                                                  ?std <https://w3id.org/i40/sto#hasClassification> ?classification),
                                                        BGP( ?std <http://www.w3.org/2000/01/rdf-schema#label> ?sto)),
                                               BGP( ?classification <http://www.w3.org/2000/01/rdf-schema#label> ?cto)),
                                               BGP( ?initiative <http://www.w3.org/2000/01/rdf-schema#label> ?ito)),
                                      ?std_name,
                                      concat(str(?sto) ) ),
                               ?classification_name,
                               concat(str(?cto) ) ),
                        ?initiative_name,
                        concat(str(?ito) ) ),
                 {?std_name, ?classification_name, ?initiative_name, ?std, ?classification, ?initiative}))