CREATE TABLE "race_calendar" (
  "circuit" text,
  "city_state" text,
  "date" text,
  "winner" text,
  "team" text
);

Question: What is City / State, when Winner is "Rohan Onslow", and when Circuit is "Oran Park Raceway"?
SQL: SELECT "city_state" FROM "race_calendar" WHERE "winner"='rohan onslow' AND "circuit"='oran park raceway';

Question: What is Winner, when City / State is "Mallala , South Australia", and when Team is "Elfin Sports Cars"?
SQL: SELECT "winner" FROM "race_calendar" WHERE "city_state"='mallala , south australia' AND "team"='elfin sports cars';

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

Question: What is Winner, when Team is "R.J.MacArthur Onslow", and when Circuit is "Oran Park Raceway"?
SQL: SELECT "winner" FROM "race_calendar" WHERE "team"='r.j.macarthur onslow' AND "circuit"='oran park raceway';

Question: What is Date, when City / State is "Mallala , South Australia", and when Team is "R.J.MacArthur Onslow"?
SQL: SELECT "date" FROM "race_calendar" WHERE "city_state"='mallala , south australia' AND "team"='r.j.macarthur onslow';

Question: What is Winner, when Date is "20 August"?
SQL: SELECT "winner" FROM "race_calendar" WHERE "date"='20 august';