Table: train_schedule_6
Columns: departure
going_to
calling_at
arrival
operator

Question: What was the calling for the 18.42 arrival time?
SQL: SELECT "calling_at" FROM train_schedule_6 WHERE "arrival" = '18.42'

Question: What was the arrival for Wansford, Peterborough East?
SQL: SELECT "arrival" FROM train_schedule_6 WHERE "calling_at" = 'Wansford, Peterborough East'

Question: What was the departure time when the arrival was 14.40?
SQL: SELECT "departure" FROM train_schedule_6 WHERE "arrival" = '14.40'

Question: What is the departure for Peterborough East whose arrival time is 12.40?
SQL: SELECT "departure" FROM train_schedule_6 WHERE "going_to" = 'Peterborough East' AND "arrival" = '12.40'

Question: What is the calling at for the 09.50 departure?
SQL: SELECT "calling_at" FROM train_schedule_6 WHERE "departure" = '09.50'

Question: Where is the train going to when departing at 20.35?
SQL: SELECT "going_to" FROM train_schedule_6 WHERE "departure" = '20.35'