If one image shows exactly one person standing behind a glass-fronted display case that faces right.
return people ;return display case ;return #2 that is glass-fronted ;return #3 that faces right ;return #1 standing behind #4 ;return images of #5 ;return number of  #5 for each  #6 ;return #6 where  #7 is equal to  one ;return number of  #8 ;return if  #9 is equal to  one
['select', 'select', 'filter', 'filter', 'filter', 'project', 'group', 'comparative', 'aggregate', 'boolean']