Table: pittsburgh_pirates_1933_nfl
Columns: week
date
opponent
result
game_site

Question: Which opponent was played at Forbes Field after week 4?
SQL: SELECT "opponent" FROM pittsburgh_pirates_1933_nfl WHERE "game_site" = 'forbes field' AND "week" > 4

Question: Which opponent was played on week 9?
SQL: SELECT "opponent" FROM pittsburgh_pirates_1933_nfl WHERE "week" = 9

Question: What was the date of the game played at Fenway Park?
SQL: SELECT "date" FROM pittsburgh_pirates_1933_nfl WHERE "game_site" = 'fenway park'