sub _render_url {
  my $self = shift;
  my $stanza = shift;
  my $arg = shift;
  my $url = $self->{'cfg'}->{'_DATA'}->{$stanza}->{$arg}[0];
  print STDERR "Now rendering page at: $url.\n";
  $self->{'agent'}->get($url);
  my $html = $self->{'agent'}->content();
  return $html;
}