What is Away Team, when Home Team is "Ipswich Town", and when Date is "6 February 1986"?
CREATE TABLE "fourth_round_proper" (
  "tie_no" text,
  "home_team" text,
  "score" text,
  "away_team" text,
  "date" text
);
SELECT "away_team" FROM "fourth_round_proper" WHERE "home_team"='ipswich town' AND "date"='6 february 1986';