CREATE TABLE table_35336 ("Date" CLOB, "Round" CLOB, "Opponent" CLOB, "Venue" CLOB, "Result" CLOB, "Attendance" FLOAT)

What round has hereford united as the opponent?
SELECT "Round" FROM table_35336 WHERE "Opponent" = 'hereford united'
SELECT "Round" FROM "table_35336" WHERE "Opponent" = 'hereford united'