page.rb  seaches for divs that are not in the current HTML of factbook such as:
          [ @opts[:fields] ? 'Introduction'        : 'intro',    '<div id="CollapsiblePanel1_Intro"'   ],
          [ @opts[:fields] ? 'Geography'           : 'geo',      '<div id="CollapsiblePanel1_Geo"'     ],
          [ @opts[:fields] ? 'People and Society'  : 'people',   '<div id="CollapsiblePanel1_People"'  ],
          [ @opts[:fields] ? 'Government'          : 'govt',     '<div id="CollapsiblePanel1_Govt"'    ],
          [ @opts[:fields] ? 'Economy'             : 'econ',     '<div id="CollapsiblePanel1_Econ"'    ],
          [ @opts[:fields] ? 'Energy'              : 'energy',   '<div id="CollapsiblePanel1_Energy"'  ],
          [ @opts[:fields] ? 'Communications'      : 'comm',     '<div id="CollapsiblePanel1_Comm"'    ],
          [ @opts[:fields] ? 'Transportation'      : 'trans',    '<div id="CollapsiblePanel1_Trans"'   ],
          [ @opts[:fields] ? 'Military'            : 'military', '<div id="CollapsiblePanel1_Military"'],
          [ @opts[:fields] ? 'Transnational Issues': 'issues',   '<div id="CollapsiblePanel1_Issues"'  ]
So the resulting data is always empty.