all flights and fares from pittsburgh to dallas round trip after 12 pm less than 1100 dollars
O O O O O B-fromloc.city_name O B-toloc.city_name B-round_trip I-round_trip B-depart_time.time_relative B-depart_time.time I-depart_time.time B-cost_relative O B-fare_amount I-fare_amount