The following DataNodes have no identifier: 2
http://classic.wikipathways.org/instance/WP3191_rr117636 http://rdf.wikipathways.org/Pathway/WP3191_rr117636/DataNode/a1e28 (GAB2)
http://classic.wikipathways.org/instance/WP3191_rr117636 http://rdf.wikipathways.org/Pathway/WP3191_rr117636/DataNode/b95c4 (TSLP)