what is the operator of trains arriving at 13.39 
CREATE TABLE table_18333678_2 (operator VARCHAR, arrival VARCHAR)
SELECT operator FROM table_18333678_2 WHERE arrival = "13.39"
### Context: CREATE TABLE table_18333678_2 (operator VARCHAR, arrival VARCHAR) ### Question: what is the operator of trains arriving at 13.39  ### Answer: SELECT operator FROM table_18333678_2 WHERE arrival = "13.39"