What is Opponents, when Partner is Mervana Jugić-Salkić?
CREATE TABLE "doubles_5_2_3" (
  "outcome" text,
  "date" text,
  "tournament" text,
  "surface" text,
  "partner" text,
  "opponents" text,
  "score" text
);
SELECT "opponents" FROM "doubles_5_2_3" WHERE "partner"='mervana jugić-salkić';