Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Which date was the event that Yani won in a playoff over Yueh-Chyn Huang?

### Inputs:
table_name: table, columns: ['Date', 'Winning score', 'To par', 'Margin of victory', 'Runner(s)-up']

### Response:
SELECT Date FROM table WHERE Margin of victory = playoff AND Runner(s)-up = yueh-chyn huang