What is Circuit, when Team is "R.J.MacArthur Onslow", and when City / State is "Sydney , New South Wales"?
CREATE TABLE "race_calendar" (
  "circuit" text,
  "city_state" text,
  "date" text,
  "winner" text,
  "team" text
);
SELECT "circuit" FROM "race_calendar" WHERE "team"='r.j.macarthur onslow' AND "city_state"='sydney , new south wales';