user: Question: Name the total number of attendance for october 20, 1946 with week less than 4
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 29, 1946', 'Pittsburgh Steelers', 'T 14-14', 33620.0]
SQL:

assistant: SELECT SUM("Attendance") FROM "Table" WHERE "Date" = 'october 20, 1946' AND "Week" < 4.0;