gistfile1.js

var sessions = [].map.call($$('tr[dir]'), function(row, i) {
  if (i < 6) {
    return;
  }
  row = [].map.call(row.children, function(td) {
    return td.textContent;
  });
  var s = [{},{}];
  s[0].time = row[1]
  s[0].speaker = row[5]
  s[0].talk = row[6]

  s[1].time = row[8]
  s[1].speaker = row[12]
  s[1].talk = row[13]

  return s;
});

sessions = sessions.filter(function(s) {
  return s != undefined;
});

sessions.map(function(s) {
  var back = s[0];
  var side = s[1];
  return 'back track ' + back.time + '\n' +
      back.talk + '\n' +
      back.speaker + (side.speaker ? ('\n\n' +
      'side track ' + side.time + '\n' +
      side.talk + '\n' +
      side.speaker) : '')
}).join('\n\n\n');