CREATE TABLE table_204_53 (id DECIMAL, "date" TEXT, "result" TEXT, "opponent" TEXT, "event" TEXT, "location" TEXT, "method" TEXT, "round" DECIMAL, "time" TEXT)

which event ended with the longest time ?
SELECT "event" FROM table_204_53 ORDER BY "time" DESC LIMIT 1
SELECT "event" FROM "table_204_53" ORDER BY "time" DESC NULLS LAST LIMIT 1