The following DataNodes have no identifier: 3
http://classic.wikipathways.org/instance/WP4147_r94394 http://rdf.wikipathways.org/Pathway/WP4147_r94394/DataNode/c4eae (miR-145)
http://classic.wikipathways.org/instance/WP4147_r94394 http://rdf.wikipathways.org/Pathway/WP4147_r94394/DataNode/ee0b7 (miR-18a)
http://classic.wikipathways.org/instance/WP4147_r94394 http://rdf.wikipathways.org/Pathway/WP4147_r94394/DataNode/f7c58 (miR-495)
More details at https://www.wikipathways.org/WikiPathwaysCurator/DataNodesTests/dataNodesWithoutIdentifier