CREATE TABLE table_name_52 (date VARCHAR2, ground VARCHAR2, opponent VARCHAR2, tournament VARCHAR2)

Which date's opponent was Dender when the tournament was in the Jupiler League and the ground was a?
SELECT date FROM table_name_52 WHERE opponent = "dender" AND tournament = "jupiler league" AND ground = "a"
SELECT "date" FROM "table_name_52" WHERE "a" = "ground" AND "dender" = "opponent" AND "jupiler league" = "tournament"