Question: Which week had a result of L 38-21?
SQL: SELECT "Week" FROM "2-18814667-2" WHERE "Result" = 'L 38-21';

Question: Who was the opponent after week 8 that had 72,190 people in attendance?
SQL: SELECT "Opponent" FROM "2-18814667-2" WHERE "Week" > 8.0 AND "Attendance" = '72,190';