Which Opposing Team has an Against of 3, and a Date of 11 february 1950?
CREATE TABLE "fa_cup" (
  "opposing_team" text,
  "against" real,
  "date" text,
  "venue" text,
  "round" text
);
SELECT "opposing_team" FROM "fa_cup" WHERE "against"=3 AND "date"='11 february 1950';