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

### Instruction:
On what circuit was the City of Ipswich 400 race  held?

### Inputs:
table_name: table, columns: ['Rd.', 'Race Title', 'Circuit', 'City / State', 'Date', 'Winner', 'Team', 'Report']

### Response:
SELECT Circuit FROM table WHERE Race Title = City of Ipswich 400