If all the lemons are free of leaves.
return lemons ;return leaves ;return #1 that have #2 ;return #1 besides  #3 ;return the  number of  #1 ;return the  number of  #4 ;return if  #5 is equal to  #6
['select', 'select', 'filter', 'discard', 'aggregate', 'aggregate', 'boolean']