text: 
  """
  
  SPARQL Update statements can be applied with :meth:`rdflib.graph.Graph.update`
  
  """
  
  import rdflib
  
  if __name__=='__main__':
  
      g = rdflib.Graph()
      g.load("foaf.rdf")
  
      g.update('''
      PREFIX foaf: <http://xmlns.com/foaf/0.1/>
      PREFIX dbpedia: <http://dbpedia.org/resource/>
      INSERT
          { ?s a dbpedia:Human . }
      WHERE
          { ?s a foaf:Person . }
      ''')
  
      for x in g.subjects(
              rdflib.RDF.type, rdflib.URIRef('http://dbpedia.org/resource/Human')):
          print(x)
  