CREATE TABLE table_66724 ("Year" FLOAT, "Tournament" CLOB, "Venue" CLOB, "Result" CLOB, "Extra" CLOB)

Result of 1st, and an Extra of 4 x 400 m relay is in what lowest year?
SELECT MIN("Year") FROM table_66724 WHERE "Result" = '1st' AND "Extra" = '4 x 400 m relay'
SELECT MIN("Year") FROM "table_66724" WHERE "Extra" = '4 x 400 m relay' AND "Result" = '1st'