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_68 (dance VARCHAR, worst_dancer_s_ VARCHAR, worst_score VARCHAR)
### Question:
What is the dance that has priscilla presley is the worst dancer(s), and the worst score of 21?
### Answer:
SELECT dance FROM table_name_68 WHERE worst_dancer_s_ = "priscilla presley" AND worst_score = "21"