CREATE TABLE table_67991 ("Year" TEXT, "Date Final" TEXT, "Venue" TEXT, "Prize Money" TEXT, "Champion" TEXT, "Runner-up" TEXT, "Score in final" TEXT, "Commercial name" TEXT)

What champion has 1981 as the year?
SELECT "Champion" FROM table_67991 WHERE "Year" = '1981'
SELECT "Champion" FROM "table_67991" WHERE "Year" = '1981'