i would like information on any flights from san francisco to pittsburgh arriving in pittsburgh before 8 am tuesday morning
O O O O O O O O B-fromloc.city_name I-fromloc.city_name O B-toloc.city_name O O B-toloc.city_name B-arrive_time.time_relative B-arrive_time.time I-arrive_time.time B-arrive_date.day_name B-arrive_time.period_of_day