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_204_30 ( id number, "year built" text, "works number" number, "wheel arr." text, "gauge" text, "original owner" text, "name" text, "current location" text, "notes" text )

### Question ###
who owned the last locomotive to be built ?

### Accurate SQL ###

SELECT "original owner" FROM table_204_30 ORDER BY "year built" DESC LIMIT 1