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_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?

### Accurate SQL ###

SELECT runner_up FROM table_name_18 WHERE champion = "0" AND fourth_place = "0" AND rank = 6