The following DataNodes have no identifier: 2
http://classic.wikipathways.org/instance/WP1287_r106953 http://rdf.wikipathways.org/Pathway/WP1287_r106953/DataNode/e0307 (GLYATL1)
http://classic.wikipathways.org/instance/WP1287_r106953 http://rdf.wikipathways.org/Pathway/WP1287_r106953/DataNode/bc23e (GLYATL2)
More details at https://www.wikipathways.org/WikiPathwaysCurator/DataNodesTests/dataNodesWithoutIdentifier