CREATE TABLE "indy_500_results" (
  "year" real,
  "chassis" text,
  "engine" text,
  "start" text,
  "finish" text
);

Question: Name the engine for year less than 1977
SQL: SELECT "engine" FROM "indy_500_results" WHERE "year"<1977;

Question: Name the start for year less than 1977
SQL: SELECT "start" FROM "indy_500_results" WHERE "year"<1977;

Question: Name the least year for start of 17th
SQL: SELECT MIN("year") FROM "indy_500_results" WHERE "start"='17th';

Question: Name the start for finish being 21st
SQL: SELECT "start" FROM "indy_500_results" WHERE "finish"='21st';