Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_23 (worst_score INTEGER, best_dancer VARCHAR, best_score VARCHAR)

### 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?

### Accurate SQL ###

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