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

### Instruction:
Who owns the locomotive that entered service on 30 October 1956?

### Inputs:
table_name: table, columns: ['Locomotive', 'Pre-conversion', 'Entered service (T)', 'Re-entered service (P)', 'Owner']

### Response:
SELECT Owner FROM table WHERE Entered service (T) = 30 october 1956