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

### Instruction:
Which date of Date of successor's formal installation has a State (class) of michigan (2)?

### Inputs:
table_name: table, columns: ['State (class)', 'Vacator', 'Reason for change', 'Successor', "Date of successor's formal installation"]

### Response:
SELECT Date of successor's formal installation FROM table WHERE State (class) = michigan (2)