code: def _manual_lookup(self, facebook_id, facebook_id_string):
          
          resp = self._session.get(
              'https://www.facebook.com/%s' % facebook_id,
              allow_redirects=True, timeout=10
          )
          # No point in trying to get this using BeautifulSoup. The HTML here
          # is the very epitome of what it is to be invalid...
          m = _MANUAL_NAME_MATCHER.search(resp.text)
          if m:
              name = m.group(1)
          else:
              name = facebook_id_string
          self._cached_profiles[facebook_id] = name
          return name
docs: People who we have not communicated with in a long time
          will not appear in the look-ahead cache that Facebook keeps.
          We must manually resolve them.
  
          :param facebook_id: Profile ID of the user to lookup.
          :return: