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_14115168_4 (national_titles INTEGER, school VARCHAR)
### Question:
how many overall championships does concordia university have
### Answer:
SELECT MIN(national_titles) FROM table_14115168_4 WHERE school = "Concordia University"