user: Question: Who was the leading scorer in the game where the visiting team was the Pistons?
Columns: ['Date', 'Visitor', 'Score', 'Home', 'Leading scorer', 'Attendance', 'Record']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['January 3, 2008', 'Spurs', '77–80', 'Nuggets', 'Two-way tie (20)', 19155.0, '21–9']
SQL:

assistant: SELECT "Leading scorer" FROM "Table" WHERE "Visitor" = 'Pistons';