Name the number of week for game site being memorial stadium for buffalo bills
{'header': ['Week', 'Date', 'Opponent', 'Result', 'Record', 'Game Site', 'Attendance'], 'page_title': '1983 Baltimore Colts season', 'section_title': 'Schedule', 'caption': 'Schedule', 'rows': [['1', 'September 4, 1983', 'at New England Patriots', 'W 29–23 OT', '1–0', 'Sullivan Stadium', '45526'], ['2', 'September 11, 1983', 'Denver Broncos', 'L 10–17', '1–1', 'Memorial Stadium', '52613'], ['3', 'September 18, 1983', 'at Buffalo Bills', 'L 23–28', '1–2', 'Rich Stadium', '40937'], ['4', 'September 25, 1983', 'Chicago Bears', 'W 22–19', '2–2', 'Memorial Stadium', '34350'], ['5', 'October 2, 1983', 'at Cincinnati Bengals', 'W 34–31', '3–2', 'Riverfront Stadium', '48104'], ['6', 'October 9, 1983', 'New England Patriots', 'W 12–7', '4–2', 'Memorial Stadium', '35618'], ['7', 'October 16, 1983', 'Buffalo Bills', 'L 7–30', '4–3', 'Memorial Stadium', '38565'], ['8', 'October 23, 1983', 'Miami Dolphins', 'L 7–21', '4–4', 'Memorial Stadium', '32343'], ['9', 'October 30, 1983', 'at Philadelphia Eagles', 'W 22–21', '5–4', 'Veterans Stadium', '59150'], ['10', 'November 6, 1983', 'at New York Jets', 'W 17–14', '6–4', 'Shea Stadium', '53323'], ['11', 'November 13, 1983', 'Pittsburgh Steelers', 'L 13–24', '6–5', 'Memorial Stadium', '57319'], ['12', 'November 20, 1983', 'at Miami Dolphins', 'L 17–50', '6–6', 'Miami Orange Bowl', '54482'], ['13', 'November 27, 1983', 'at Cleveland Browns', 'L 23–41', '6–7', 'Cleveland Stadium', '65812'], ['14', 'December 4, 1983', 'New York Jets', 'L 6–10', '6–8', 'Memorial Stadium', '35462'], ['15', 'December 11, 1983', 'at Denver Broncos', 'L 19–21', '6–9', 'Mile High Stadium', '74864']]}