Which Event has a Surface of semifinal, and a Winner of hard (i)?
CREATE TABLE "best_5_matches_by_atp_world_tour_com" (
  "event" real,
  "round" text,
  "surface" text,
  "winner" text,
  "opponent" text,
  "result" text
);
SELECT MAX("event") FROM "best_5_matches_by_atp_world_tour_com" WHERE "surface"='semifinal' AND "winner"='hard (i)';