Which Date has a Stadium of giants stadium, and a Week smaller than 13, and an Opponent of seattle seahawks?
CREATE TABLE "schedule" (
  "week" real,
  "date" text,
  "opponent" text,
  "result" text,
  "channel" text,
  "stadium" text,
  "attendance" text
);
SELECT "date" FROM "schedule" WHERE "stadium"='giants stadium' AND "week"<13 AND "opponent"='seattle seahawks';