How many wins did Hobbs had a 15th finish at poles 0?
CREATE TABLE "career_summary" (
  "season" real,
  "series" text,
  "team" text,
  "races" text,
  "wins" text,
  "poles" text,
  "podiums" text,
  "points" text,
  "final_placing" text
);
SELECT "wins" FROM "career_summary" WHERE "poles"='0' AND "final_placing"='15th';