user: Question: What is Guido Bontempi's general classification when he has a stage of 6?
Columns: ['Stage', 'Winner', 'General classification', 'Points classification', 'Young rider classification', 'Team classification']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['P', 'Thierry Marie', 'Thierry Marie', 'Thierry Marie', 'Jesus Blanco Villar', 'Système U']
SQL:

assistant: SELECT "General classification" FROM "Table" WHERE "Winner" = 'Guido Bontempi' AND "Stage" = '6';