What surface was used on may 13, 2007?
CREATE TABLE table_name_19 (surface VARCHAR, date VARCHAR)
SELECT surface FROM table_name_19 WHERE date = "may 13, 2007"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_19 (surface VARCHAR, date VARCHAR) Question: What surface was used on may 13, 2007? [/INST] SELECT surface FROM table_name_19 WHERE date = "may 13, 2007" </s>