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

### Instruction:
What is the marriage date for the Habsburg-Lorraine house member who died 29 December 1829?

### Inputs:
table_name: table, columns: ['Name', 'Birth', 'Marriage', 'Became Duchess', 'Ceased to be Duchess', 'Death', 'Spouse']

### Response:
SELECT Marriage FROM table WHERE Death = 29 december 1829