Quem era o RL Süd (1o) quando o FK Pirmasens era o RL Südwest (1o)?
CREATE TABLE table_20217456_7 (rl_süd__1st_ VARCHAR, rl_südwest__1st_ VARCHAR)
SELECT rl_süd__1st_ FROM table_20217456_7 WHERE rl_südwest__1st_ = "FK Pirmasens"