The following DataNodes have no identifier: 2
http://classic.wikipathways.org/instance/WP3869_rr118463 http://rdf.wikipathways.org/Pathway/WP3869_rr118463/DataNode/b4e42 (Anti-inflammatory pathways)
http://classic.wikipathways.org/instance/WP3869_rr118463 http://rdf.wikipathways.org/Pathway/WP3869_rr118463/DataNode/c4413 (protein tyrosine kinases)