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

### Instruction:
What is the Riding, when the Rank is 4th?

### Inputs:
table_name: table, columns: ['Riding', "Candidate's Name", 'Gender', 'Residence', 'Occupation', 'Votes', 'Rank']

### Response:
SELECT Riding FROM table WHERE Rank = 4th