If one image shows one gray baby elephant walking with no more than three adults.
return images ;return elephant in  #1 ;return #2 that are gray ;return #3 that are babies ;return #3 that are adults ;return #4 walking with #5 ;return number of  #5 for each  #6 ;return #6 where  #7 is at most three ;return number of  #8 for each  #1 ;return #1 where  #9 is equal to  one ;return number of  #10 ;return if  #11 is equal to  one
['select', 'project', 'filter', 'filter', 'filter', 'filter', 'group', 'comparative', 'group', 'comparative', 'aggregate', 'boolean']