code: def author_names(self):
          
          return {"%s$$n%i" % (author.get_urn(), i): name[1]
                  for author in self.get_authors()
                  for i, name in enumerate(author.get_names())
                  if author.get_urn() is not None}
docs: Returns a dictionary like this:
  
          {
              "urn:cts:greekLit:tlg0012$$n1" : "Homer"
              , "urn:cts:greekLit:tlg0012$$n2" : "Omero"
              , ...
          }