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