user: Question: What is the lowest week number that there was a game on October 23, 1977 with less than 68977 people attending?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Record', 'Game Site', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 18, 1977', 'at Seattle Seahawks', 'W 29–14', '1–0', 'Kingdome', 58991.0]
SQL:

assistant: SELECT MIN("Week") FROM "Table" WHERE "Attendance" < 68977.0 AND "Date" = 'October 23, 1977';