What is the ground of the tim trophy competition, which had a time of 23:00 cet?
CREATE TABLE "pre_season_and_friendlies" (
  "date" text,
  "time" text,
  "competition" text,
  "opponent" text,
  "ground" text,
  "score" text
);
SELECT "ground" FROM "pre_season_and_friendlies" WHERE "competition"='tim trophy' AND "time"='23:00 cet';