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_79 (enrollment INTEGER, year_joined VARCHAR, location VARCHAR)
### Question:
what is the enrollement for the year joined 1958 in clarksville?
### Answer:
SELECT SUM(enrollment) FROM table_name_79 WHERE year_joined = 1958 AND location = "clarksville"