Which stage has a Winner of lucien van impe?
CREATE TABLE table_name_19 (stage VARCHAR, winner VARCHAR)
SELECT stage FROM table_name_19 WHERE winner = "lucien van impe"
### Context: CREATE TABLE table_name_19 (stage VARCHAR, winner VARCHAR) ### Question: Which stage has a Winner of lucien van impe? ### Answer: SELECT stage FROM table_name_19 WHERE winner = "lucien van impe"