If two blue birds are perched on a branch in the image on the left.
return the  image on the left ;return birds in  #1 ;return #2 that are  blue ;return a  branch ;return #3 perched on #4 ;return number of #5 ;return if  #6 is  equal to two
['select', 'project', 'filter', 'select', 'filter', 'aggregate', 'boolean']