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

### Instruction:
What's the most area of Bochum Part 2 with a population less than 15,911?

### Inputs:
table_name: table, columns: ['Place', 'Code', 'Area (km 2 )', 'Population', 'Most spoken language']

### Response:
SELECT MAX Area (km 2 ) FROM table WHERE Place = bochum part 2 AND Population < 15,911