CREATE TABLE table_42208 ("Record" TEXT, "Athlete" TEXT, "Nation" TEXT, "Venue" TEXT, "Date" TEXT)

What is the Nation with a Date that is may 6, 1991?
SELECT "Nation" FROM table_42208 WHERE "Date" = 'may 6, 1991'
SELECT "Nation" FROM "table_42208" WHERE "Date" = 'may 6, 1991'