Table: australian_grand_prix_1997
Columns: driver
constructor
laps
time_retired
grid

Question: Tell me the constructor for grid of 8
SQL: SELECT "constructor" FROM australian_grand_prix_1997 WHERE "grid" = 8

Question: I want the total number of Grids for heinz-harald frentzen
SQL: SELECT COUNT("grid") FROM australian_grand_prix_1997 WHERE "driver" = 'heinz-harald frentzen'