user: 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?
Columns: ['Dance', 'Best dancer', 'Best score', 'Worst dancer', 'Worst score']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Cha-cha-cha', 'Laila Ali', 30.0, 'Billy Ray Cyrus', 13.0]
SQL:

assistant: SELECT "Worst score" FROM "Table" WHERE "Best dancer" = 'apolo anton ohno' AND "Best score" > 30.0;