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

### Instruction:
Name the principal of Northfield Junior-Senior High School.

### Inputs:
table_name: table, columns: ['School', 'City / Town', 'Website', 'Size', 'Principal', 'Grades', 'IDOE Profile']

### Response:
SELECT Principal FROM table WHERE School = Northfield Junior-Senior High School