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_1672804_2 (region VARCHAR, province VARCHAR)
### Question:
What is the region containing the Constitutional Province of Callao?
### Answer:
SELECT region FROM table_1672804_2 WHERE province = "Constitutional province of Callao"