user: Question: Which date was the event that Yani won in a Playoff over Yueh-Chyn Huang?
Columns: ['Date', 'Winning score', 'To par', 'Margin of victory', 'Runner(s)-up']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['3 Mar 2007', '70-70-75=215', '−1', 'Playoff', 'Russy Gulyanamitta']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Margin of victory" = 'Playoff' AND "Runner(s)-up" = 'Yueh-Chyn Huang';