What surface was the città di caltanissetta played on?
CREATE TABLE table_name_22 (surface VARCHAR, tournament VARCHAR)
SELECT surface FROM table_name_22 WHERE tournament = "città di caltanissetta"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_22 (surface VARCHAR, tournament VARCHAR) Question: What surface was the città di caltanissetta played on? [/INST] SELECT surface FROM table_name_22 WHERE tournament = "città di caltanissetta" </s>