What's the worst score for the worst dancer(s) john barnes, with a best score of 36?
CREATE TABLE "highest_and_lowest_scoring_performances" (
  "dance" text,
  "best_dancer_s" text,
  "best_score" real,
  "worst_dancer_s" text,
  "worst_score" real
);
SELECT "worst_score" FROM "highest_and_lowest_scoring_performances" WHERE "best_score"=36 AND "worst_dancer_s"='john barnes';