What is the average number of laps for the driver Piero Taruffi?
CREATE TABLE table_name_50 (laps INTEGER, driver VARCHAR)
SELECT AVG(laps) FROM table_name_50 WHERE driver = "piero taruffi"
### Context: CREATE TABLE table_name_50 (laps INTEGER, driver VARCHAR) ### Question: What is the average number of laps for the driver Piero Taruffi? ### Answer: SELECT AVG(laps) FROM table_name_50 WHERE driver = "piero taruffi"