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

Question: What is the sum of Week when there were 67,968 people in attendance?
SQL: SELECT SUM("week") FROM "schedule" WHERE "attendance"='67,968';

Question: What is the Week number with a result of l 31–28?
SQL: SELECT COUNT("week") FROM "schedule" WHERE "result"='l 31–28';