Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_20 (country VARCHAR, format VARCHAR, catalog VARCHAR)
### Question:
What country has an LP format, catalog s 31503?
### Answer:
SELECT country FROM table_name_20 WHERE format = "lp" AND catalog = "s 31503"