If in the right image the bookshelf has four different shelves with the bottom left shelf being empty.
return the  right image ;return bookshelf in  #1 ;return different shelves of #2 ;return number of  #3 ;return if  #4 is equal to  four ;return shelf of #2 ;return #6 on the  bottom left ;return if  #7 is empty ;return if  both  #5 and #8 are true
['select', 'project', 'project', 'aggregate', 'boolean', 'project', 'filter', 'boolean', 'boolean']