If two wooden hutches, both with straight flat upper edges, are different widths.
return hutches ;return #1 that are wooden ;return upper edges of #2 ;return #2 where  #3 are flat ;return #4 where  #3 are straight ;return widths of #5 ;return #5 where  #6 are different ;return number of  #7 ;return if  #8 is equal to  two
['select', 'filter', 'project', 'comparative', 'comparative', 'project', 'comparative', 'aggregate', 'boolean']