Table: canada_2003_race
Columns: driver
constructor
laps
time_retired
grid

Question: What is the average laps for ralph firman with a grid of over 19?
SQL: SELECT AVG("laps") FROM canada_2003_race WHERE "driver" = 'ralph firman' AND "grid" > 19

Question: What grid features 6 laps?
SQL: SELECT "grid" FROM canada_2003_race WHERE "laps" = 6