What country does the player named Mark Cox play for?
CREATE TABLE "table1_29302711_13" (
  "rk" real,
  "name" text,
  "country" text,
  "matches_played" real,
  "matches_won" real,
  "points" real,
  "prize_money_usd" real
);
SELECT "country" FROM "table1_29302711_13" WHERE "name"='Mark Cox';