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_8 (gauge VARCHAR, concessionaire VARCHAR)
### Question:
What was the guage of the concessionaire ferrosur roca?
### Answer:
SELECT gauge FROM table_name_8 WHERE concessionaire = "ferrosur roca"