user: Question: Which dAte's opponent wAs Dender when the tournAment wAs in the Jupiler LeAgue And the ground wAs A?
Columns: ['Date', 'Tournament', 'Round', 'Ground', 'Opponent', 'Score 1']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['28 Jul 2007', 'Belgian Supercup', 'Final', 'H', 'ClubBrugge', '3 – 1']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Opponent" = 'Dender' AND "Tournament" = 'Jupiler League' AND "Ground" = 'A';