The following DataNodes have no identifier: 4
http://classic.wikipathways.org/instance/WP1055_r117539 http://rdf.wikipathways.org/Pathway/WP1055_r117539/DataNode/f4bb7 (CEBPA )
http://classic.wikipathways.org/instance/WP1055_r117539 http://rdf.wikipathways.org/Pathway/WP1055_r117539/DataNode/f6ad3 (CEBPB )
http://classic.wikipathways.org/instance/WP1055_r117539 http://rdf.wikipathways.org/Pathway/WP1055_r117539/DataNode/d1b57 (GAB2 )
http://classic.wikipathways.org/instance/WP1055_r117539 http://rdf.wikipathways.org/Pathway/WP1055_r117539/DataNode/b78c6 (PIK3R2)
More details at https://www.wikipathways.org/WikiPathwaysCurator/DataNodesTests/dataNodesWithoutIdentifier