What color object is on the left side of the gray thing and in front of the purple cylinder?
return the   gray thing ;return the   purple cylinder ;return objects ;return #3 that  are on  the   left side of #1 ;return #3 that  are in  front of #2 ;return #3 in  both  #4 and #5 ;return the   color of #6
['select', 'select', 'select', 'filter', 'filter', 'intersection', 'project']