If one of the boats appears to be facing forward, the other does not.
return boats ;return #1 that appears to  be facing forward ;return #1 besides  #2 ;return number of  #2 ;return number of  #3 ;return if  #4 is equal to  one ;return if  #5 is equal to  one ;return if  both  #6 and #7 are true
['select', 'filter', 'discard', 'aggregate', 'aggregate', 'boolean', 'boolean', 'boolean']