CREATE TABLE table_56533 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Event" TEXT, "Round" FLOAT, "Time" TEXT, "Location" TEXT)

Which event was in round 1, resulted in a win, and a record of 15-4?
SELECT "Event" FROM table_56533 WHERE "Round" = '1' AND "Res." = 'win' AND "Record" = '15-4'
SELECT "Event" FROM "table_56533" WHERE "Record" = '15-4' AND "Res." = 'win' AND "Round" = '1'