What is the final score of the runner-up on 9 February 1992?
CREATE TABLE "doubles_10_6_4" (
  "outcome" text,
  "date" text,
  "tournament" text,
  "surface" text,
  "partner" text,
  "opponents_in_final" text,
  "score_in_final" text
);
SELECT "score_in_final" FROM "doubles_10_6_4" WHERE "outcome"='runner-up' AND "date"='9 february 1992';