The following DataNodes have no identifier: 3
http://classic.wikipathways.org/instance/WP3242_r125627 http://rdf.wikipathways.org/Pathway/WP3242_r125627/DataNode/bd470 (HTR2C)
http://classic.wikipathways.org/instance/WP3242_r125627 http://rdf.wikipathways.org/Pathway/WP3242_r125627/DataNode/e930d (KRAS)
http://classic.wikipathways.org/instance/WP3242_r125627 http://rdf.wikipathways.org/Pathway/WP3242_r125627/DataNode/d128e (PLC)
More details at https://www.wikipathways.org/WikiPathwaysCurator/DataNodesTests/dataNodesWithoutIdentifier