Table: t_1966_british_grand_prix
Columns: driver
constructor
laps
time_retired
grid

Question: What is the time/retired for grid 19?
SQL: SELECT "time_retired" FROM t_1966_british_grand_prix WHERE "grid" = 19

Question: What is the grid total for bruce mclaren with over 73 laps?
SQL: SELECT SUM("grid") FROM t_1966_british_grand_prix WHERE "laps" > 73 AND "driver" = 'bruce mclaren'