CREATE TABLE grants (grant_amount VARCHAR, grant_end_date INT)
CREATE TABLE Grants (grant_amount VARCHAR, grant_id VARCHAR)
CREATE TABLE Documents (grant_id VARCHAR, sent_date INT)

What are the distinct grant amount for the grants where the documents were sent before '1986-08-26 20:49:27' and grant were ended after '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'
SELECT "T1"."grant_amount" FROM "grants" AS "T1" JOIN "Documents" AS "T2" ON "T1"."grant_id" = "T2"."grant_id" AND "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'