What is the earliest year with a category of Top 10 Selling Mandarin Albums of the Year?
CREATE TABLE "award_and_nominations" (
  "year" real,
  "award" text,
  "category" text,
  "nomination" text,
  "result" text
);
SELECT MIN("year") FROM "award_and_nominations" WHERE "category"='top 10 selling mandarin albums of the year';