CREATE TABLE "race_results" (
  "driver" text,
  "car_num" real,
  "make" text,
  "points" text,
  "laps" real,
  "winnings" text
);

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

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

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