Steve Wallace was a Race Winner at the Kentucky Speedway on what date?
CREATE TABLE "schedule_and_results" (
  "date" text,
  "track" text,
  "event_name" text,
  "pole_winner" text,
  "race_winner" text
);
SELECT "date" FROM "schedule_and_results" WHERE "race_winner"='steve wallace' AND "track"='kentucky speedway';