CREATE TABLE "schedule" (
  "week" real,
  "date" text,
  "opponent" text,
  "result" text,
  "attendance" text
);

Question: Which attendance number was taken on november 21, 2004?
SQL: SELECT "attendance" FROM "schedule" WHERE "date"='november 21, 2004';

Question: Which attendance number was taken in a week less than 16 when the Washington Redskins were the opponents?
SQL: SELECT "attendance" FROM "schedule" WHERE "week"<16 AND "opponent"='washington redskins';

Question: How many weeks had the Green Bay packers as opponents?
SQL: SELECT SUM("week") FROM "schedule" WHERE "opponent"='green bay packers';