user: Question: What day did they play on week 4?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 30, 1956', 'at Chicago Cardinals', 'L 9–7', 20966.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Week" = 4.0;