CREATE TABLE table_13728 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Event" TEXT, "Round" FLOAT, "Time" TEXT, "Location" TEXT)

What round had a time of 0:39?
SELECT MIN("Round") FROM table_13728 WHERE "Time" = '0:39'
SELECT MIN("Round") FROM "table_13728" WHERE "Time" = '0:39'