code: def show_graph_summary(g):
      
      sample_data = []
      print("list(g[RDFS.Class]) = " + str(len(list(g[RDFS.Class]))))
      # Get Subject Lists
      num_subj = 0
      for subj in g.subjects(RDF.type):
          num_subj += 1
          if num_subj < 5:
              sample_data.append("subjects.subject: " + get_string_from_rdf(subj))
      print("g.subjects(RDF.type) = " + str(num_subj))
      
      # Get Sample of Subjects, Predicates, Objects
      num_subj = 0
      for subj, pred, obj in g:
          num_subj += 1
          if num_subj < 5:
              sample_data.append("g.subject   : " + get_string_from_rdf(pred))
              sample_data.append("g.predicate : " + get_string_from_rdf(subj))
              sample_data.append("g.object    : " + get_string_from_rdf(obj))
              
      print("g.obj(RDF.type) = " + str(num_subj))
      
      
      print ("------ Sample Data ------")
      for line in sample_data:
          print(line)
docs: display sample data from a graph