Question: Which driver's grid was 24?
SQL: SELECT "Driver" FROM "2-15894301-2" WHERE "Grid" = 24.0;

Question: What is the mean number of laps when the grid is less than 19 and time/retired is +21.3 secs?
SQL: SELECT AVG("Laps") FROM "2-15894301-2" WHERE "Grid" < 19.0 AND "Time/Retired" = '+21.3 secs';

Question: What is the smallest number of laps for Team Green when the grid is 1?
SQL: SELECT MIN("Laps") FROM "2-15894301-2" WHERE "Team" = 'Team Green' AND "Grid" = 1.0;