user: Question: What is the lowest attendance for december 14, 1958 after week 12?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 28, 1958', 'Pittsburgh Steelers', 'W 23–20', 51856.0]
SQL:

assistant: SELECT MIN("Attendance") FROM "Table" WHERE "Date" = 'december 14, 1958' AND "Week" > 12.0;