If there is a single pelican in flight with the wings in the downward position
return pelicans ;return #1 that are  in  flight ;return wings of  #2 ;return #2 where #3 are  in  the  downward position ;return number of #4 ;return if  #5 is  equal to one
['select', 'filter', 'project', 'comparative', 'aggregate', 'boolean']