CREATE TABLE table_14591 ("Res." CLOB, "Record" CLOB, "Opponent" CLOB, "Method" CLOB, "Event" CLOB, "Round" FLOAT, "Time" CLOB, "Location" CLOB)

Which Opponent has a Method of submission?
SELECT "Opponent" FROM table_14591 WHERE "Method" = 'submission'
SELECT "Opponent" FROM "table_14591" WHERE "Method" = 'submission'