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_29163303_1 (surface VARCHAR, championship VARCHAR)
### Question:
On what surface was the Australian Open (6) played on?
### Answer:
SELECT surface FROM table_29163303_1 WHERE championship = "Australian Open (6)"