user: Question: What was the highest attendance of games that resulted in L 23-20?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 21, 1975', 'at St. Louis Cardinals', 'L 23-20', 42172.0]
SQL:

assistant: SELECT MAX("Attendance") FROM "Table" WHERE "Result" = 'L 23-20';