Which season has a Staffel E of Stahl Riesa?
CREATE TABLE table_name_21 (season VARCHAR, staffel_e VARCHAR)
SELECT season FROM table_name_21 WHERE staffel_e = "stahl riesa"
### Context: CREATE TABLE table_name_21 (season VARCHAR, staffel_e VARCHAR) ### Question: Which season has a Staffel E of Stahl Riesa? ### Answer: SELECT season FROM table_name_21 WHERE staffel_e = "stahl riesa"