The following DataNodes have no identifier: 2
http://www.wikipathways.org/instance/WP1033_rr117471 http://rdf.wikipathways.org/Pathway/WP1033_rr117471/DataNode/b47da (TFs)
http://www.wikipathways.org/instance/WP1033_rr117471 http://rdf.wikipathways.org/Pathway/WP1033_rr117471/DataNode/fd8ec (TFs)