Table: italian_grand_prix_1951
Columns: driver
constructor
laps
time_retired
grid

Question: Tell me the Laps for time/retired of +8 laps
SQL: SELECT "laps" FROM italian_grand_prix_1951 WHERE "time_retired" = '+8 laps'

Question: Tell me the sum of laps with a time/retired of +13 laps with grid more than 18
SQL: SELECT SUM("laps") FROM italian_grand_prix_1951 WHERE "time_retired" = '+13 laps' AND "grid" > 18

Question: I want the lowest laps that have a grid of 12
SQL: SELECT MIN("laps") FROM italian_grand_prix_1951 WHERE "grid" = 12

Question: Tell me the sum of the grid with alfa romeo and toulo de graffenried
SQL: SELECT SUM("grid") FROM italian_grand_prix_1951 WHERE "constructor" = 'alfa romeo' AND "driver" = 'toulo de graffenried'