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_73 (province VARCHAR, largest_city VARCHAR)
### Question:
What province has the largest city of Birjand?
### Answer:
SELECT province FROM table_name_73 WHERE largest_city = "birjand"