user: Question: During stage 21, who held the Intergiro classification?
Columns: ['Stage', 'Winner', 'General classification', 'Points classification', 'Mountains classification', 'Young rider classification', 'Intergiro classification', 'Trofeo Fast Team']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1', 'Thierry Marie', 'Thierry Marie', 'Thierry Marie', 'not awarded', 'Julio César Ortegón', 'Miguel Indurain', 'Castorama']
SQL:

assistant: SELECT "Intergiro classification" FROM "Table" WHERE "Stage" = '21';