CREATE TABLE table_13484 ("Place" TEXT, "Player" TEXT, "Country" TEXT, "Score" FLOAT, "To par" TEXT)

What is the score when To par was 3, in South Africa, for Richard Sterne?
SELECT AVG("Score") FROM table_13484 WHERE "To par" = '−3' AND "Country" = 'south africa' AND "Player" = 'richard sterne'
SELECT AVG("Score") FROM "table_13484" WHERE "Country" = 'south africa' AND "Player" = 'richard sterne' AND "To par" = '−3'