On what surface was the Australian Open (6) played on?
CREATE TABLE table_29163303_1 (surface VARCHAR, championship VARCHAR)
SELECT surface FROM table_29163303_1 WHERE championship = "Australian Open (6)"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_29163303_1 (surface VARCHAR, championship VARCHAR) Question: On what surface was the Australian Open (6) played on? [/INST] SELECT surface FROM table_29163303_1 WHERE championship = "Australian Open (6)" </s>