What is the lowest attendance of a game that has the result of 2-0?
CREATE TABLE "fa_cup" (
  "date" text,
  "round" text,
  "opponent" text,
  "venue" text,
  "result" text,
  "attendance" real,
  "scorers" text
);
SELECT MIN("attendance") FROM "fa_cup" WHERE "result"='2-0';