Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_80 (owner VARCHAR, entered_service__t_ VARCHAR)
### Question:
Who owns the locomotive that entered service on 30 October 1956?
### Answer:
SELECT owner FROM table_name_80 WHERE entered_service__t_ = "30 october 1956"