all flights from baltimore to atlanta between 1 o'clock and 3 o'clock in the afternoon
O O O B-fromloc.city_name O B-toloc.city_name O B-depart_time.start_time I-depart_time.start_time O B-depart_time.end_time I-depart_time.end_time O O B-depart_time.period_of_day