What is the round when they played against Middlesbrough, and the h/a was h?
CREATE TABLE "league_cup" (
  "date" text,
  "round" text,
  "opponents" text,
  "h_a" text,
  "result_f_a" text,
  "attendance" real
);
SELECT "round" FROM "league_cup" WHERE "opponents"='middlesbrough' AND "h_a"='h';