What are the products with the maximum page size eqal to A4 or a pages per minute color less than 5?
return products ;return maximum page sizes of #1 ;return #1 where #2 is  A4 ;return pages per minute color of #1 ;return #1 where #4 is  lower than 5 ;return #3 or  #5
['select', 'project', 'comparative', 'project', 'comparative', 'union']