Table: grand_prix_1999
Columns: driver
constructor
laps
time_retired
grid

Question: what is the lowest grid when the laps is more than 7 and the driver is rubens barrichello?
SQL: SELECT MIN("grid") FROM grand_prix_1999 WHERE "laps" > 7 AND "driver" = 'rubens barrichello'

Question: what is the grid when the laps is more than 0, the time/retired is engine and the driver is pedro de la rosa?
SQL: SELECT "grid" FROM grand_prix_1999 WHERE "laps" > 0 AND "time_retired" = 'engine' AND "driver" = 'pedro de la rosa'

Question: who is the driver with the grid of 13?
SQL: SELECT "driver" FROM grand_prix_1999 WHERE "grid" = 13