How many attended game(s) against the boston patriots?
{'header': ['Week', 'Date', 'Opponent', 'Result', 'Game site', 'Record', 'Attendance'], 'page_title': '1963 Denver Broncos season', 'section_title': 'Regular season', 'caption': 'Regular season', 'rows': [['1', 'September 7, 1963', 'Kansas City Chiefs', 'L 7–59', 'University of Denver Stadium', '0–1', '21115'], ['2', 'September 14, 1963', 'at Houston Oilers', 'L 14–20', 'Jeppesen Stadium', '0–2', '23147'], ['4', 'September 29, 1963', 'Boston Patriots', 'W 14–10', 'Bears Stadium', '1–2', '18636'], ['5', 'October 6, 1963', 'San Diego Chargers', 'W 50–34', 'Bears Stadium', '2–2', '18428'], ['6', 'October 13, 1963', 'Houston Oilers', 'L 24–33', 'Bears Stadium', '2–3', '24087'], ['7', 'October 18, 1963', 'at Boston Patriots', 'L 21–40', 'Fenway Park', '2–4', '25418'], ['8', 'October 26, 1963', 'at New York Jets', 'T 35–35', 'Polo Grounds', '2–4–1', '20377'], ['9', 'November 3, 1963', 'Buffalo Bills', 'L 28–30', 'Bears Stadium', '2–5–1', '19424'], ['10', 'November 9, 1963', 'at Buffalo Bills', 'L 17–27', 'War Memorial Stadium', '2–6–1', '30989'], ['11', 'November 17, 1963', 'New York Jets', 'L 9–14', 'Bears Stadium', '2–7–1', '14247'], ['13', 'November 28, 1963', 'Oakland Raiders', 'L 10–26', 'Bears Stadium', '2–8–1', '14763'], ['14', 'December 7, 1963', 'at Kansas City Chiefs', 'L 21–52', 'Municipal Stadium', '2–9–1', '17443'], ['15', 'December 15, 1963', 'at Oakland Raiders', 'L 31–35', 'Frank Youell Field', '2–10–1', '15223']]}