message: I should have looked at the PDB specification instead of an example
  file.
diff: @@ -546,7 +546,7 @@ std::string cnn_visualization::get_xyz(const std::string &line)
  {
  std::string x = line.substr(31,7);
  std::string y = line.substr(39,7);
  - std::string z = line.substr(48,6);
  + std::string z = line.substr(47,7);
  boost::trim_left(x);
  boost::trim_left(y);
  boost::trim_left(z);
  