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_98 (last_yr INTEGER, l_plyf INTEGER)
### Question:
What is the average last yr with an l plyf less than 0?
### Answer:
SELECT AVG(last_yr) FROM table_name_98 WHERE l_plyf < 0