What is the surface at the tournament of Vaihingen?
CREATE TABLE table_name_24 (surface VARCHAR, tournament VARCHAR)
SELECT surface FROM table_name_24 WHERE tournament = "vaihingen"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_24 (surface VARCHAR, tournament VARCHAR) Question: What is the surface at the tournament of Vaihingen? [/INST] SELECT surface FROM table_name_24 WHERE tournament = "vaihingen" </s>