If there are four visible walkways in front of four traditional buildings.
return walkways ;return #1 that are visible ;return number of  #2 ;return #2 where  #3 is equal to  four  ;return traditional buildings ;return number of  #5 ;return #5 where  #6 is four  ;return if  #4 are in  front of #7
['select', 'filter', 'aggregate', 'comparative', 'select', 'aggregate', 'comparative', 'boolean']