The following DataNodes have no identifier: 3
http://classic.wikipathways.org/instance/WP3233_r125294 http://rdf.wikipathways.org/Pathway/WP3233_r125294/DataNode/c8b23 (CR1)
http://classic.wikipathways.org/instance/WP3233_r125294 http://rdf.wikipathways.org/Pathway/WP3233_r125294/DataNode/cf231 (MT-TL1)
http://classic.wikipathways.org/instance/WP3233_r125294 http://rdf.wikipathways.org/Pathway/WP3233_r125294/DataNode/d79c9 (MT-TL1)
More details at https://www.wikipathways.org/WikiPathwaysCurator/DataNodesTests/dataNodesWithoutIdentifier