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

### Instruction:
When john w. leftwich (uu) is the successor what is the date the successor was seated?

### Inputs:
table_name: table, columns: ['District', 'Vacator', 'Reason for change', 'Successor', 'Date successor seated']

### Response:
SELECT Date successor seated FROM table WHERE Successor = John W. Leftwich (UU)