Table: train_schedule_7
Columns: departure
going_to
calling_at
arrival
operator

Question: how many callings of trains arriving at 09.06
SQL: SELECT COUNT("calling_at") FROM train_schedule_7 WHERE "arrival" = '09.06'

Question: what is the operator of trains arriving at 13.39 
SQL: SELECT "operator" FROM train_schedule_7 WHERE "arrival" = '13.39'

Question: when does the train departuring at 11.35 arrive
SQL: SELECT "arrival" FROM train_schedule_7 WHERE "departure" = '11.35'

Question: when does the train arriving at bourne at 11.45 departure 
SQL: SELECT "departure" FROM train_schedule_7 WHERE "going_to" = 'Bourne' AND "arrival" = '11.45'

Question: when does the train arriving at stamford east at 11.45 departure 
SQL: SELECT "departure" FROM train_schedule_7 WHERE "arrival" = '11.45' AND "going_to" = 'Stamford East'