What is the location for the year under 2010 and the year Hei Zhi Hong won silver?
CREATE TABLE "taijiquan" (
  "year" real,
  "location" text,
  "gold" text,
  "silver" text,
  "bronze" text
);
SELECT "location" FROM "taijiquan" WHERE "year"<2010 AND "silver"='hei zhi hong';