If a weightlifter in one image has one arm stretched straight up, holding a weighted barbell.
return weightlifter ;return arm of #1 ;return #1 where  #2 is stretched straight up ;return barbell ;return #4 that is weighted ;return #1 where  #2 is holding #5 ;return #1 in  both  #3 and #6 ;return if  #7 is in  one image
['select', 'project', 'comparative', 'select', 'filter', 'comparative', 'intersection', 'boolean']