user: Question: What is the Week of the game with a Result of W 48–20?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Game site', 'Record', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 16', 'Cincinnati Bengals', 'W 28–10', 'Mile High Stadium', '1–0', 49059.0]
SQL:

assistant: SELECT "Week" FROM "Table" WHERE "Result" = 'W 48–20';