What is Class, when Dates is "22 April - 3 May 2009"?
CREATE TABLE "qualifying_races" (
  "place" text,
  "country" text,
  "qualifying_grand_prix" text,
  "class" text,
  "dates" text
);
SELECT "class" FROM "qualifying_races" WHERE "dates"='22 april - 3 may 2009';