On what date was the match higher than 8 on ground A against Guiseley?
CREATE TABLE "friendlies" (
  "match" real,
  "date" text,
  "competition_or_tour" text,
  "ground" text,
  "opponent" text,
  "score1" text
);
SELECT "date" FROM "friendlies" WHERE "match">8 AND "ground"='a' AND "opponent"='guiseley';