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

### Instruction:
Name the capacity for single cab size 2 medium tanker

### Inputs:
table_name: table, columns: ['Category', 'Sub-category', 'Cab size', 'Drive wheels', 'Capacity (litres)']

### Response:
SELECT Capacity (litres) FROM table WHERE Cab size = Single AND Category = 2 Medium tanker