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_13836704_7 (international_passengers VARCHAR, rank VARCHAR)
### Question:
What is the total number of passengers of the airport ranked 15?
### Answer:
SELECT international_passengers FROM table_13836704_7 WHERE rank = 15