Which kind of Edition that has a Surface of clay, and Park Sung-Hee as an opponent?
CREATE TABLE "singles_4_4" (
  "edition" text,
  "round" text,
  "date" text,
  "surface" text,
  "opponent" text,
  "result" text
);
SELECT "edition" FROM "singles_4_4" WHERE "surface"='clay' AND "opponent"='park sung-hee';