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

### Instruction:
What is the start date with Luke Jacobz hosting and Dannii Minogue as a winning mentor?

### Inputs:
table_name: table, columns: ['Series', 'Start', 'Finish', 'Winner', 'Runner-up', 'Third place', 'Winning mentor', 'Main host']

### Response:
SELECT Start FROM table WHERE Main host = luke jacobz AND Winning mentor = dannii minogue