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_18 (runner_up VARCHAR, rank VARCHAR, champion VARCHAR, fourth_place VARCHAR)
### Question:
What was the runner-up when champion is 0, 4th place is 0 and rank is 6?
### Answer:
SELECT runner_up FROM table_name_18 WHERE champion = "0" AND fourth_place = "0" AND rank = 6