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_56 (losses INTEGER, team VARCHAR, goals_against VARCHAR)
### Question:
What is the sum of the losses by the Montreal Hockey Club, who have more than 15 Goals Against?
### Answer:
SELECT SUM(losses) FROM table_name_56 WHERE team = "montreal hockey club" AND goals_against > 15