What is the surface of the French Championships?
CREATE TABLE table_2215159_2 (surface VARCHAR, championship VARCHAR)
SELECT surface FROM table_2215159_2 WHERE championship = "French championships"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_2215159_2 (surface VARCHAR, championship VARCHAR) Question: What is the surface of the French Championships? [/INST] SELECT surface FROM table_2215159_2 WHERE championship = "French championships" </s>