If in at least one image there is a single castle facing forward.
return castles ;return #1 that are  facing forward ;return images of  #2 ;return number of #2 for each #3 ;return #3 where #4 is  equal to one ;return number of #5 ;return if  #6 is  at least one
['select', 'filter', 'project', 'group', 'comparative', 'aggregate', 'boolean']