What is Runner(s)-Up, when Margin of Victory is 1 Stroke, and when Tournament is Joburg Open 1?
CREATE TABLE "sunshine_tour_wins_6" (
  "date" text,
  "tournament" text,
  "winning_score" text,
  "margin_of_victory" text,
  "runner_s_up" text
);
SELECT "runner_s_up" FROM "sunshine_tour_wins_6" WHERE "margin_of_victory"='1 stroke' AND "tournament"='joburg open 1';