CREATE TABLE table_71928 ("Res." CLOB, "Record" CLOB, "Opponent" CLOB, "Method" CLOB, "Event" CLOB, "Round" FLOAT, "Location" CLOB)

What Event used submission (rear naked choke) with 9-4?
SELECT "Event" FROM table_71928 WHERE "Method" = 'submission (rear naked choke)' AND "Record" = '9-4'
SELECT "Event" FROM "table_71928" WHERE "Method" = 'submission (rear naked choke)' AND "Record" = '9-4'