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_97 (longest_span_in_s_metre___feet__ VARCHAR, land VARCHAR, name VARCHAR)
### Question:
How long is the UK's Ballochmyle Viaduct?
### Answer:
SELECT longest_span_in_s_metre___feet__ FROM table_name_97 WHERE land = "uk" AND name = "ballochmyle viaduct"