query: SELECT name FROM station WHERE station_id NOT IN (SELECT station_id FROM train_station)
question: Show station names without any trains.
query_toks: SELECT name FROM station WHERE station_id NOT IN ( SELECT station_id FROM train_station )
query_toks_no_value: select name from station where station_id not in ( select station_id from train_station )
question_toks: Show station names without any trains.