What was the score for a match before 13, and a home game on April 21, 2008?
CREATE TABLE "s_league" (
  "match" real,
  "date" text,
  "home_away" text,
  "opponent_team" text,
  "score" text
);
SELECT "score" FROM "s_league" WHERE "match"<13 AND "home_away"='home' AND "date"='april 21, 2008';