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

### Instruction:
Which Built by has a Name of northern jaeger?

### Inputs:
table_name: table, columns: ['Name', 'Length', 'Tonnage', 'Built by', 'Year', 'Engines', 'Horsepowers', 'Former Names']

### Response:
SELECT Built by FROM table WHERE Name = northern jaeger