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_31 (wheels VARCHAR, railway VARCHAR, built VARCHAR, location VARCHAR)
### Question:
Which Wheels has Built smaller than 1958, a Location of york, and a Railway of nsr?
### Answer:
SELECT wheels FROM table_name_31 WHERE built < 1958 AND location = "york" AND railway = "nsr"