If in one image, two towels hang side by side on one bar.
return towels ;return bar ;return #1 that hang side by side  ;return #3 that is on #2 ;return images ;return number of  #4 for each  #5 ;return #5 where  #6 is equal to  two ;return number of  #7 ;return if  #8 is equal to  one
['select', 'select', 'filter', 'filter', 'select', 'group', 'comparative', 'aggregate', 'boolean']