What was the highest match when the away opponent was Dalian Shide Siwu?
CREATE TABLE "s_league" (
  "match" real,
  "date" text,
  "home_away" text,
  "opponent_team" text,
  "score" text
);
SELECT MAX("match") FROM "s_league" WHERE "opponent_team"='dalian shide siwu' AND "home_away"='away';