item-0 at level 0: unspecified: group _root_ item-1 at level 1: section: group sheet: Sheet1 item-2 at level 2: table with [7x3] item-3 at level 1: section: group sheet: Sheet2 item-4 at level 2: table with [9x4] item-5 at level 2: table with [5x3] item-6 at level 2: table with [5x3] item-7 at level 1: section: group sheet: Sheet3 item-8 at level 2: table with [7x3] item-9 at level 2: table with [7x3] item-10 at level 2: picture