If there is exactly one scraper not attached to a vehicle in the image on the left
return left image ;return scraper in  #1 ;return vehicle in  #1 ;return #2 that is attached to  #3 ;return #2 besides  #4 ;return number of  #5 ;return if  #6 is equal to  one
['select', 'project', 'project', 'filter', 'discard', 'aggregate', 'boolean']