Table: argentinagrandprix_1975
Columns: driver
constructor
laps
time_retired
grid

Question: I want the lowest Grid for Rolf Stommelen
SQL: SELECT MIN("grid") FROM argentinagrandprix_1975 WHERE "driver" = 'rolf stommelen'

Question: I want the constructor for grid less than 20 and Laps of 6
SQL: SELECT "constructor" FROM argentinagrandprix_1975 WHERE "grid" < 20 AND "laps" = 6