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_20396710_1 (points_difference VARCHAR, points_for VARCHAR)
### Question:
when the points for is 139 is points difference?
### Answer:
SELECT COUNT(points_difference) FROM table_20396710_1 WHERE points_for = "139"