CREATE TABLE "tournament_results" (
  "date" text,
  "tournament" text,
  "location" text,
  "purse" real,
  "winner" text,
  "score" text,
  "1st_prize" real
);

Question: What is average prize for first place with a $500,000 purse in the Franklin Quest Championship?
SQL: SELECT AVG("1st_prize") FROM "tournament_results" WHERE "purse"='500,000' AND "tournament"='franklin quest championship';