return me the papers written by " H. V. Jagadish " and " Divesh Srivastava " before 2000 . 
return papers ;return #1 written by H. V. Jagadish ;return #1 written by Divesh Srivastava ;return #1 in both #2 and  #3 ;return #4 before 2000
['select', 'filter', 'filter', 'intersection', 'filter']