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

### Instruction:
How many people vacated to successor Dave E. Satterfield, Jr. (d)?

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

### Response:
SELECT COUNT Vacator FROM table WHERE Successor = Dave E. Satterfield, Jr. (D)