Which Host City has more than 6 Silver and a Total of 22?
CREATE TABLE "summer" (
  "year" text,
  "edition" text,
  "host_city" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT "host_city" FROM "summer" WHERE "silver">6 AND "total"=22;