Table: football_games_4
Columns: week
date
kickoff
opponent
final_score
team_record
game_site
attendance

Question: What opponents played Waldstadion in a game?
SQL: SELECT "opponent" FROM football_games_4 WHERE "game_site" = 'Waldstadion'

Question: What was the maximum week that had attendance of 10738?
SQL: SELECT MAX("week") FROM football_games_4 WHERE "attendance" = 10738