query: SELECT ObjectNumber FROM railway WHERE Railway_ID NOT IN (SELECT Railway_ID FROM train)
question: Are Listing object number of railways no have any trains.
query_toks: SELECT ObjectNumber FROM railway WHERE Railway_ID NOT IN ( SELECT Railway_ID FROM train )
query_toks_no_value: select objectnumber from railway where railway_id not in ( select railway_id from train )
question_toks: Are Listing object number of railways no have any trains.