What is the worst score for the dance that has Apolo Anton Ohno as the best dancer, and where his best score is larger than 30?
CREATE TABLE "highest_and_lowest_scoring_performances" (
  "dance" text,
  "best_dancer" text,
  "best_score" real,
  "worst_dancer" text,
  "worst_score" real
);
SELECT SUM("worst_score") FROM "highest_and_lowest_scoring_performances" WHERE "best_dancer"='apolo anton ohno' AND "best_score">30;