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_39 (lost INTEGER, goals_for INTEGER)
### Question:
What was the lowest lost entry for a team with fewer than 21 goals for?
### Answer:
SELECT MIN(lost) FROM table_name_39 WHERE goals_for < 21