What is the capital of the province with 양주 in Hangul?
CREATE TABLE "provinces_of_unified_silla" (
  "former_kingdom" text,
  "province" text,
  "hangul" text,
  "hanja" text,
  "capital" text,
  "modern_equivalent" text
);
SELECT "capital" FROM "provinces_of_unified_silla" WHERE "hangul"='양주';