user: Question: What was the total attendance at a game against the pittsburgh steelers before week 4?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 29, 1957', 'at Cleveland Browns', 'L 6–3', 58095.0]
SQL:

assistant: SELECT SUM("Attendance") FROM "Table" WHERE "Opponent" = 'pittsburgh steelers' AND "Week" < 4.0;