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

### Instruction:
When did the person who died on 6 Dec 1240 get married?

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

### Response:
SELECT Marriage FROM table WHERE Death = 6 dec 1240