What district has Riley Joseph Wilson as the incumbent?
CREATE TABLE table_1342331_18 (
    district VARCHAR,
    incumbent VARCHAR
)
SELECT district FROM table_1342331_18 WHERE incumbent = "Riley Joseph Wilson"
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 district has Riley Joseph Wilson as the incumbent? ### Input: CREATE TABLE table_1342331_18 (
    district VARCHAR,
    incumbent VARCHAR
) ### Response: SELECT district FROM table_1342331_18 WHERE incumbent = "Riley Joseph Wilson"