CREATE TABLE "highest_and_lowest_scoring_performances" (
  "dance" text,
  "best_dancer" text,
  "best_score" real,
  "worst_dancer" text,
  "worst_score" real
);

Question: What dance was Leeza Gibbons the worst dancer for, receiving a score lower than 15?
SQL: SELECT MIN("best_score") FROM "highest_and_lowest_scoring_performances" WHERE "worst_dancer"='leeza gibbons' AND "worst_score"<15;

Question: 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?
SQL: SELECT SUM("worst_score") FROM "highest_and_lowest_scoring_performances" WHERE "best_dancer"='apolo anton ohno' AND "best_score">30;