What is Country, when Class is "15 meters", and when Qualifying Grand Prix is "Soaring Grand Prix Of United Kingdom"?
CREATE TABLE "qualifying_races" (
  "place" text,
  "country" text,
  "qualifying_grand_prix" text,
  "class" text,
  "dates" text
);
SELECT "country" FROM "qualifying_races" WHERE "class"='15 meters' AND "qualifying_grand_prix"='soaring grand prix of united kingdom';