What is the location of the tournament with more than 6 OWGR points and Ryu Hyun-Woo as the winner?
CREATE TABLE "2013_schedule" (
  "dates" text,
  "tournament" text,
  "location" text,
  "prize_fund_krw" text,
  "winner" text,
  "owgr_points" real
);
SELECT "location" FROM "2013_schedule" WHERE "owgr_points">6 AND "winner"='ryu hyun-woo';