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

### Instruction:
How many were built with a locomotive number of 11-20?

### Inputs:
table_name: table, columns: ['Class', 'Wheels', 'Date', 'No. built', 'Loco Nos.']

### Response:
SELECT No. built FROM table WHERE Loco Nos. = 11-20