CREATE TABLE "calendar" (
  "rd" real,
  "circuit" text,
  "city_state" text,
  "date" text,
  "format" text,
  "round_winner" text,
  "car" text,
  "entrant" text
);

Question: Who is the round winner when entrant is craven mild racing?
SQL: SELECT "round_winner" FROM "calendar" WHERE "entrant"='Craven Mild Racing';

Question: Who is the round winner of the wanneroo park circuit?
SQL: SELECT "round_winner" FROM "calendar" WHERE "circuit"='Wanneroo Park';

Question: Which circuit has two heats as the format?
SQL: SELECT "circuit" FROM "calendar" WHERE "format"='Two heats';