user: Question:  how many opponent with date being October 25, 1964
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Record', 'Game Site', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 13, 1964', 'at Minnesota Vikings', 'L 24–34', '0–1', 'Metropolitan Stadium', 35563.0]
SQL:

assistant: SELECT COUNT("Opponent") FROM "Table" WHERE "Date" = 'October 25, 1964';