item-0 at level 0: unspecified: group _root_
  item-1 at level 1: title: Header
    item-2 at level 2: text: This is the first paragraph.
    item-3 at level 2: table with [2x2]
      item-4 at level 3: unspecified: group rich_cell_group_2_0_1
        item-5 at level 4: table with [2x3]
    item-6 at level 2: text: After table