CREATE TABLE table_name_23 (worst_score NUMBER, best_dancer VARCHAR2, best_score VARCHAR2)

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?
SELECT SUM(worst_score) FROM table_name_23 WHERE best_dancer = "apolo anton ohno" AND best_score > 30
SELECT SUM("worst_score") FROM "table_name_23" WHERE "apolo anton ohno" = "best_dancer" AND "best_score" > 30