Update issue 49
Update issue 49

RDFLib/rdflib,avorio/rdflib,RDFLib/rdflib,avorio/rdflib,avorio/rdflib,marma/rdflib,yingerj/rdflib,armandobs14/rdflib,ssssam/rdflib,marma/rdflib,marma/rdflib,armandobs14/rdflib,yingerj/rdflib,ssssam/rdflib,dbs/rdflib,armandobs14/rdflib,dbs/rdflib,marma/rdflib,yingerj/rdflib,RDFLib/rdflib,ssssam/rdflib,yingerj/rdflib,dbs/rdflib,RDFLib/rdflib,armandobs14/rdflib,avorio/rdflib,dbs/rdflib,ssssam/rdflib