what is the outcome when the surface is grass on 23 june 1997?
CREATE TABLE "singles_26_17_9" (
  "outcome" text,
  "date" text,
  "championship" text,
  "surface" text,
  "opponent" text,
  "score" text
);
SELECT "outcome" FROM "singles_26_17_9" WHERE "surface"='grass' AND "date"='23 june 1997';