Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_80 (owner VARCHAR, entered_service__t_ VARCHAR)

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

### Accurate SQL ###

SELECT owner FROM table_name_80 WHERE entered_service__t_ = "30 october 1956"