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_12 (rank VARCHAR, nationality VARCHAR, time VARCHAR)
### Question:
How many ranks have a ationality of canada, and a Time of dns?
### Answer:
SELECT COUNT(rank) FROM table_name_12 WHERE nationality = "canada" AND time = "dns"