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

### Instruction:
What's the model designation of the model with GVW of 2828/2.78 kg/ton and axle ratio of 9/47?

### Inputs:
table_name: table, columns: ['Model Type', 'Model Designation', 'Engine', 'Wheelbase (mm/inch)', 'GVW (kg/ton)', 'Axle Ratio']

### Response:
SELECT Model Designation FROM table WHERE GVW (kg/ton) = 2828/2.78 AND Axle Ratio = 9/47