CREATE TABLE table_name_9 (best_score NUMBER, worst_dancer VARCHAR2, worst_score VARCHAR2)

What dance was Leeza Gibbons the worst dancer for, receiving a score lower than 15?
SELECT MIN(best_score) FROM table_name_9 WHERE worst_dancer = "leeza gibbons" AND worst_score < 15
SELECT MIN("best_score") FROM "table_name_9" WHERE "leeza gibbons" = "worst_dancer" AND "worst_score" < 15