Table: t_1950_italian_grand_prix
Columns: driver
constructor
laps
time_retired
grid

Question: When the driver is Juan Manuel Fangio and laps is less than 39, what is the highest grid?
SQL: SELECT MAX("grid") FROM t_1950_italian_grand_prix WHERE "laps" < 39 AND "driver" = 'juan manuel fangio'

Question: When grid is less than 7, laps are greater than 17, and time/retired is + 1:35.6, who is the constructor?
SQL: SELECT "constructor" FROM t_1950_italian_grand_prix WHERE "laps" > 17 AND "grid" < 7 AND "time_retired" = '+ 1:35.6'

Question: What was the smallest grid for Prince bira?
SQL: SELECT MIN("grid") FROM t_1950_italian_grand_prix WHERE "driver" = 'prince bira'