If no furniture is visible in front of the book shelf in at least one of the pictures.
return furniture ;return book shelf ;return #1 visible in  front of #2 ;return pictures ;return the  number of  #3 for each  #4 ;return #4 where  #5 is equal to  zero ;return the  number of  #6 ;return if  #7 is at least one
['select', 'select', 'filter', 'select', 'group', 'comparative', 'aggregate', 'boolean']