What is the surface of the palermo, italy championship?
CREATE TABLE "singles_23_14_9" (
  "outcome" text,
  "date" text,
  "championship" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score_in_the_final" text
);
SELECT "surface" FROM "singles_23_14_9" WHERE "championship"='palermo, italy';