user: Question: What was the catalog when the label was Frontiers Records?
Columns: ['Region', 'Date', 'Label', 'Catalog', 'Format']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['USA', 'June 3, 2008', 'Nomota LLC', '4506-2', '2 CD + DVD']
SQL:

assistant: SELECT "Catalog" FROM "Table" WHERE "Label" = 'Frontiers Records';