Table: race_results_2007_australian_2
Columns: rider
manufacturer
laps
time_retired
grid

Question: What's the number of laps for 16 grids?
SQL: SELECT SUM("laps") FROM race_results_2007_australian_2 WHERE "grid" = 16

Question: Who was the rider for laps less than 23 with grid greater than 21 that had a time of +1 lap?
SQL: SELECT "rider" FROM race_results_2007_australian_2 WHERE "laps" < 23 AND "grid" > 21 AND "time_retired" = '+1 lap'

Question: What's the total grid for someone with a time/retire of +44.831
SQL: SELECT COUNT("grid") FROM race_results_2007_australian_2 WHERE "time_retired" = '+44.831'

Question: What's the smallest grid for Time/Retired of +22.687?
SQL: SELECT MIN("grid") FROM race_results_2007_australian_2 WHERE "time_retired" = '+22.687'