user: Question: Who was the opponent at the game with a score of 42-28 after week 4?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Score', 'Record']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'August 31, 1947', 'Brooklyn Dodgers', 'W', '23-7', '1-0']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Week" > 4.0 AND "Score" = '42-28';