If one dog's tail is docked; the other dog's tail is normal.
return one dog  ;return the  other dog  ;return tail  of #1 ;return tail  of #2 ;return if  #3 is docked ;return if  #4 is normal ;return if  both  #5 and #6 are true
['select', 'select', 'project', 'project', 'boolean', 'boolean', 'boolean']