Table: swiss_grand_prix_1952
Columns: driver
constructor
laps
time_retired
grid

Question: What is the average number of laps for the driver Piero Taruffi?
SQL: SELECT AVG("laps") FROM swiss_grand_prix_1952 WHERE "driver" = 'piero taruffi'

Question: Which driver has 12 laps and a grid of less than 10?
SQL: SELECT "driver" FROM swiss_grand_prix_1952 WHERE "laps" = 12 AND "grid" < 10