In what district was Tim Holden the incumbent? 
CREATE TABLE table_1341453_40 (district VARCHAR, incumbent VARCHAR)
SELECT district FROM table_1341453_40 WHERE incumbent = "Tim Holden"
### Context: CREATE TABLE table_1341453_40 (district VARCHAR, incumbent VARCHAR) ### Question: In what district was Tim Holden the incumbent?  ### Answer: SELECT district FROM table_1341453_40 WHERE incumbent = "Tim Holden"