What surface was played on when Piet Norval was a partner?
CREATE TABLE table_name_24 (surface VARCHAR, partner VARCHAR)
SELECT surface FROM table_name_24 WHERE partner = "piet norval"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_24 (surface VARCHAR, partner VARCHAR) Question: What surface was played on when Piet Norval was a partner? [/INST] SELECT surface FROM table_name_24 WHERE partner = "piet norval" </s>