What was the guage of the concessionaire ferrosur roca?
CREATE TABLE table_name_8 (gauge VARCHAR, concessionaire VARCHAR)
SELECT gauge FROM table_name_8 WHERE concessionaire = "ferrosur roca"
### 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"