Make sample code working
Make sample code working

Change:
- two bad indentations,
- one unwanted ],
- missing URIRef import.
marma/rdflib,armandobs14/rdflib,yingerj/rdflib,yingerj/rdflib,dbs/rdflib,RDFLib/rdflib,yingerj/rdflib,ssssam/rdflib,RDFLib/rdflib,RDFLib/rdflib,avorio/rdflib,armandobs14/rdflib,avorio/rdflib,ssssam/rdflib,avorio/rdflib,dbs/rdflib,dbs/rdflib,ssssam/rdflib,marma/rdflib,armandobs14/rdflib,avorio/rdflib,armandobs14/rdflib,marma/rdflib,RDFLib/rdflib,yingerj/rdflib,dbs/rdflib,ssssam/rdflib,marma/rdflib