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_39 (gauge VARCHAR, locomotive VARCHAR, status VARCHAR, owner VARCHAR)
### Question:
What is the Gauge of Locomotive G534 Owned by Aurizon which has a Status of Operational?
### Answer:
SELECT gauge FROM table_name_39 WHERE status = "operational" AND owner = "aurizon" AND locomotive = "g534"