Table: race_results_2006_500
Columns: driver
car
make
points
laps
winnings

Question: What make of car did Brian Vickers drive?
SQL: SELECT "make" FROM race_results_2006_500 WHERE "driver" = 'brian vickers'

Question: What is the average car number of all the drivers with 109 points?
SQL: SELECT AVG("car") FROM race_results_2006_500 WHERE "points" = '109'

Question: What is the average car number of all the drivers who have won $111,683?
SQL: SELECT AVG("car") FROM race_results_2006_500 WHERE "winnings" = '$111,683'