user: Question: What country has an LP format, catalog S 31503?
Columns: ['Date', 'Label', 'Format', 'Country', 'Catalog']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['June 21, 1965', 'Columbia', 'LP', 'US', 'CL 2372']
SQL:

assistant: SELECT "Country" FROM "Table" WHERE "Format" = 'LP' AND "Catalog" = 'S 31503';