If each image has people on the steps in front of the building.
return people ;return steps ;return the  building ;return #2 in  front of #3 ;return #1 on #4 ;return images of #5 ;return images ;return number of  #6 ;return number of  #7 ;return if  #8 is equal to  #9
['select', 'select', 'select', 'filter', 'filter', 'project', 'select', 'aggregate', 'aggregate', 'boolean']