user: Question: What was the 6-4 score's maximum attendance?
Columns: ['Game', 'Date', 'Opponent', 'Score', 'First Star', 'Decision', 'Location', 'Attendance', 'Record', 'Points']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'real', 'text', 'real']
Sample row: [1.0, 'October 8', 'Washington Capitals', '4-2', 'E. Kane', 'C. Mason', 'Philips Arena', 15596.0, '1-0-0', 2.0]
SQL:

assistant: SELECT MAX("Attendance") FROM "Table" WHERE "Score" = '6-4';