CREATE TABLE table_64703 ("Date" CLOB, "Event" CLOB, "Heat/Semifinal/Final" CLOB, "Nation" CLOB, "Time" CLOB)

What nation has a time of 51.35 in the final heat?
SELECT "Nation" FROM table_64703 WHERE "Time" = '51.35' AND "Heat/Semifinal/Final" = 'final'
SELECT "Nation" FROM "table_64703" WHERE "Heat/Semifinal/Final" = 'final' AND "Time" = '51.35'