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 (year VARCHAR, league VARCHAR, playoffs VARCHAR)
### Question:
when did the usl a-league have conference finals?
### Answer:
SELECT year FROM table_name_56 WHERE league = "usl a-league" AND playoffs = "conference finals"