user: Question: What is Format, when Region is United States?
Columns: ['Region', 'Date', 'Label', 'Format', 'Catalog']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['United States', '1 August 1976', 'Epic Records', 'stereo LP', 'PE 34149']
SQL:

assistant: SELECT "Format" FROM "Table" WHERE "Region" = 'United States';