The following DataNodes have no identifier: 3
http://classic.wikipathways.org/instance/WP5186_r127081 http://rdf.wikipathways.org/Pathway/WP5186_r127081/DataNode/cc54d (LOO•)
http://classic.wikipathways.org/instance/WP5186_r127081 http://rdf.wikipathways.org/Pathway/WP5186_r127081/DataNode/a498c (Men)
http://classic.wikipathways.org/instance/WP5186_r127081 http://rdf.wikipathways.org/Pathway/WP5186_r127081/DataNode/ef4d2 (Mqn)
More details at https://www.wikipathways.org/WikiPathwaysCurator/DataNodesTests/dataNodesWithoutIdentifier