Give the dates of creation for documents that have both budget type codes 'GV' and 'SF'.
return documents ;return budget types codes of  #1 ;return #1 where  #2 is  'GV ;return #1 where  #2 is  'SF ;return #1 of  both #3 and #4 ;return dates of  creation of #5
['select', 'project', 'comparative', 'comparative', 'intersection', 'project']