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_52 (date VARCHAR, ground VARCHAR, opponent VARCHAR, tournament VARCHAR)
### Question:
Which date's opponent was Dender when the tournament was in the Jupiler League and the ground was a?
### Answer:
SELECT date FROM table_name_52 WHERE opponent = "dender" AND tournament = "jupiler league" AND ground = "a"