user: Question: Opponents of Sheffield Wednesday had what date?
Columns: ['Date', 'Opponents', 'Venue', 'Result', 'Score F–A']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['16 July 2007', 'Hollenbach/Hohenlohe Auswahl', 'A', 'W', '2–0']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Opponents" = 'Sheffield Wednesday';