show me all flights from san francisco to pittsburgh which arrive in pittsburgh before 9 o'clock am tomorrow
O O O O O B-fromloc.city_name I-fromloc.city_name O B-toloc.city_name O O O B-toloc.city_name B-arrive_time.time_relative B-arrive_time.time I-arrive_time.time I-arrive_time.time B-arrive_date.today_relative