user: Question: What is the number of the leading scorer for KeyArena 16,640?
Columns: ['#', 'Date', 'Visitor', 'Score', 'Home', 'Leading scorer', 'Attendance', 'Record', 'Streak']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [46.0, 'February 1', 'New York Knicks', 'W 94–88 OT', 'Portland Trail Blazers', 'Randolph : 25', 'Rose Garden 20,422', '27–19', 'W1']
SQL:

assistant: SELECT "Leading scorer" FROM "Table" WHERE "Attendance" = 'KeyArena 16,640';