Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_9 (best_score INTEGER, worst_dancer VARCHAR, worst_score VARCHAR)
### Question:
What dance was Leeza Gibbons the worst dancer for, receiving a score lower than 15?
### Answer:
SELECT MIN(best_score) FROM table_name_9 WHERE worst_dancer = "leeza gibbons" AND worst_score < 15