item-0 at level 0: unspecified: group _root_
  item-1 at level 1: paragraph: Summer activities
  item-2 at level 1: title: Swimming in the lake
    item-3 at level 2: paragraph: Duck
    item-4 at level 2: picture
    item-5 at level 2: paragraph: Figure 1: This is a cute duckling
    item-6 at level 2: section_header: Let’s swim!
      item-7 at level 3: paragraph: To get started with swimming, fi ...  down in a water and try not to drown:
      item-8 at level 3: list: group list
        item-9 at level 4: list_item: You can relax and look around
        item-10 at level 4: list_item: Paddle about
        item-11 at level 4: list_item: Enjoy summer warmth
      item-12 at level 3: paragraph: Also, don’t forget:
      item-13 at level 3: list: group list
        item-14 at level 4: list_item: Wear sunglasses
        item-15 at level 4: list_item: Don’t forget to drink water
        item-16 at level 4: list_item: Use sun cream
      item-17 at level 3: paragraph: Hmm, what else…
      item-18 at level 3: section_header: Let’s eat
        item-19 at level 4: paragraph: After we had a good day of swimm ... , it’s important to eat something nice
        item-20 at level 4: paragraph: I like to eat leaves
        item-21 at level 4: paragraph: Here are some interesting things a respectful duck could eat:
        item-22 at level 4: table with [4x3]
        item-23 at level 4: paragraph: 
        item-24 at level 4: paragraph: And let’s add another list in the end:
        item-25 at level 4: list: group list
          item-26 at level 5: list_item: Leaves
          item-27 at level 5: list_item: Berries
          item-28 at level 5: list_item: Grain