item-0 at level 0: unspecified: group _root_
  item-1 at level 1: list: group list
    item-2 at level 2: list_item: Asia
      item-3 at level 3: list: group list
        item-4 at level 4: list_item: China
        item-5 at level 4: list_item: Japan
        item-6 at level 4: list_item: Thailand
    item-7 at level 2: list_item: Europe
      item-8 at level 3: list: group list
        item-9 at level 4: list_item: UK
        item-10 at level 4: list_item: Germany
        item-11 at level 4: list_item: Switzerland
          item-12 at level 5: list: group list
            item-13 at level 6: list: group list
              item-14 at level 7: list_item: Bern
              item-15 at level 7: list_item: Aargau
        item-16 at level 4: list_item: Italy
          item-17 at level 5: list: group list
            item-18 at level 6: list: group list
              item-19 at level 7: list_item: Piedmont
              item-20 at level 7: list_item: Liguria
    item-21 at level 2: list_item: Africa