user: Question: What date has a result of Win, in a Friendly competition in Porto?
Columns: ['Date', 'Location', 'Score', 'Result', 'Competition']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['26 October 1994', 'Tallinna', '7–0', 'Win', 'Friendly']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Result" = 'Win' AND "Competition" = 'Friendly' AND "Location" = 'Porto';