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

### Instruction:
If the position in table is 10th, and the manner of departure was resigned, what was the date of vacancy?

### Inputs:
table_name: table, columns: ['Team', 'Outgoing head coach', 'Manner of departure', 'Date of vacancy', 'Position in table', 'Incoming head coach', 'Date of appointment']

### Response:
SELECT Date of vacancy FROM table WHERE Manner of departure = Resigned AND Position in table = 10th