is there a flight from denver to san francisco on continental airlines leaving after 12 o'clock in the afternoon
O O O O O B-fromloc.city_name O B-toloc.city_name I-toloc.city_name O B-airline_name I-airline_name O B-depart_time.time_relative B-depart_time.time I-depart_time.time O O B-depart_time.period_of_day