[pm#graph1_on_flight
     [any #flight (^$(no inheritance)$^),
          pm#from_place: a pm#spatial_object,
          pm#to_place: a pm#spatial_object,
          #day_of_the_week: a #day_of_the_week,
          pm#via_place: a pm#spatial_object,
          pm#departure_time: a pm#time_measure,
          pm#arrival_time: a pm#time_measure,
          may have for pm#relation_from_situation (^$(explore)$^): a pm#thing,
          pm#agent: an #airplane_pilot,
          may have for pm#experiencer: several #passenger]
];