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"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the surface of the French Championships? ### Input: CREATE TABLE table_2215159_2 (
    surface VARCHAR,
    championship VARCHAR
) ### Response: SELECT surface FROM table_2215159_2 WHERE championship = "French championships"