If the saxophone in the left image is brass, while the saxophone in the right image is silver.
return left image  ;return saxophone  in  #1 ;return if  #2 is brass ;return right image  ;return saxophone  in  #4 ;return if  #5 is silver ;return if  both  #3 and #6 are true
['select', 'project', 'boolean', 'select', 'project', 'boolean', 'boolean']