CREATE TABLE "indy_500_results" (
  "year" text,
  "start" text,
  "qual" text,
  "rank" text,
  "finish" text,
  "laps" real
);

Question: What is the qualification for rank of 29 in 1957?
SQL: SELECT "qual" FROM "indy_500_results" WHERE "rank"='29' AND "year"='1957';