If there are no more than 4 dogs behind a wire fence in the image pair
return images ;return dogs in  #1 ;return fences in  #1 ;return #3 that have wires ;return #2 that are behind #4 ;return number of  #5 ;return if  #6 is at most 4
['select', 'project', 'project', 'filter', 'filter', 'aggregate', 'boolean']