What are the different grant amounts for documents sent before '1986-08-26 20:49:27' and after the grant ended on '1989-03-16 18:27:16'?
SELECT T1.grant_amount FROM Grants AS T1 JOIN Documents AS T2 ON T1.grant_id  =  T2.grant_id WHERE T2.sent_date  <  '1986-08-26 20:49:27' INTERSECT SELECT grant_amount FROM grants WHERE grant_end_date  >  '1989-03-16 18:27:16'
'1986-08-26 20:49:27'den önce gönderilen belgeler için farklı hibe tutarları nelerdir ve hibe' 1989-03-16 18:27:16 'ile sona erdikten sonra?