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

### Instruction:
What are all the typhus number when smallpox is 4

### Inputs:
table_name: table, columns: ['Year', 'Typhus', 'Typhoid fever', 'Relapsing fever', 'Smallpox', 'Malaria']

### Response:
SELECT Typhus FROM table WHERE Smallpox = 4