do the ball near to the purple metallic cylinder and ball near to the brown metallic cylinder are same material ?
return the   purple metallic  cylinder ;return the   brown metallic  cylinder ;return balls ;return #3 near  to #1 ;return #3 near  to #2 ;return the   material of  #4 ;return the   material of  #5 ;return if  #6 and #7 are the   same
['select', 'select', 'select', 'filter', 'filter', 'project', 'project', 'boolean']