user: Question: Which Graded Hammer (Non GH3)  has a Model of CVP501?
Columns: ['Model', 'Graded Hammer (Non GH3)', 'Graded Hammer Three (GH3)', 'Natural Wood Keyboard', 'Synthetic Ivory Keytops']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['CLP230', 'no', 'yes', 'no', 'no']
SQL:

assistant: SELECT "Graded Hammer (Non GH3)" FROM "Table" WHERE "Model" = 'CVP501';