If in one image there are two birds standing on a branch.
return birds ;return branch ;return #1 that are standing on #2 ;return images ;return number of  #3 for each  #4 ;return #4 where  #5 is equal to  two ;return number of  #6 ;return if  #7 is equal to  one
['select', 'select', 'filter', 'select', 'group', 'comparative', 'aggregate', 'boolean']