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_77 (week VARCHAR, result VARCHAR)
### Question:
What is the Week number with a result of l 31–28?
### Answer:
SELECT COUNT(week) FROM table_name_77 WHERE result = "l 31–28"