user: Question: Whati s the format for the catalogno of ST 491?
Columns: ['Year', 'Title', 'Format', 'Label', 'Catalogno', 'Remark']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1970.0, 'Bloodrock', '12"LP', 'CAPITOL', 'ST 435', '#160 US']
SQL:

assistant: SELECT "Format" FROM "Table" WHERE "Catalogno" = 'ST 491';