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

### Instruction:
What district was the city with an area smaller than 12 square kilometers and a serial number of 35?

### Inputs:
table_name: table, columns: ['Serial No.', 'District', 'Headquartered City', 'City Population (2009)', 'City Area(km 2 )']

### Response:
SELECT District FROM table WHERE City Area(km 2 ) < 12 AND Serial No. = 35