[1472374409851,
  [27993, [1,17], "Handout view 18: Homomorphic expansions"],
  [549802, [1,18], "Handout view 19: Idea"],
  [568106, [1,17], "Handout view 18: Homomorphic expansions"],
  [592090, [1,18], "Handout view 19: Idea"],
  [756162, [1,19], "Handout view 20: 1-co and 2-co"],
  [1021641, [1,20], "Handout view 21: 2D relations"],
  [1313608, [1,21], "Handout view 22: Main point"],
  [1326080, [1,20], "Handout view 21: 2D relations"],
  [1333144, [1,19], "Handout view 20: 1-co and 2-co"],
  [1343992, [1,20], "Handout view 21: 2D relations"],
  [1357088, [1,19], "Handout view 20: 1-co and 2-co"],
  [1363848, [1,21], "Handout view 22: Main point"],
  [1459216, [1,21], "Handout view 22: Main point"],
  [1484472, [1,22], "Handout view 23: Problem"],
  [1503424, [1,23], "Handout view 24: Av, again"],
  [1523176, [1,24], "Handout view 25: 1-smidgen, again"],
  [1961311, [1,25], "Handout view 26: 0-smidgen, again"],
  [2049415, [1,26], "Handout view 27: How arose?"],
  [2296367, [1,25], "Handout view 26: 0-smidgen, again"],
  [2309550, [1,26], "Handout view 27: How arose?"],
  [2477558, [1,27], "Handout view 28: 0-co YB"],
  [2504287, [1,25], "Handout view 26: 0-smidgen, again"],
  [2562295, [1,27], "Handout view 28: 0-co YB"],
  [2795006, [1,28], "Handout view 29: 0-co invariants"],
  [3147533, [1,29], "Handout view 30: Sorting goal"],
  [3300885, [1,30], "Handout view 31: bbO"],
  [3765068, [1,29], "Handout view 30: Sorting goal"],
  [3798812, [1,33], "Handout view 34: T0 example"],
  [3802235, [1,36], "Handout view 37: The big g0 lemma"],
  [3830660, [1,31], "Handout view 32: Rij Lemma"],
  [3950220, [1,30], "Handout view 31: bbO"]
]