What is the average Against, when Status is "Five Nations", and when Date is "16/03/1996"?
CREATE TABLE "1996" (
  "opposing_teams" text,
  "against" real,
  "date" text,
  "venue" text,
  "status" text
);
SELECT AVG("against") FROM "1996" WHERE "status"='five nations' AND "date"='16/03/1996';