[pm#graph1_on_situation
     [any pm#situation (^$(no inheritance)$^),
          may have for pm#relation_from_situation_to_time (^$(explore)$^): a pm#time_measure,
          may have for pm#relation_from_situation_to_situation (^$(explore)$^): a pm#situation,
          may have for pm#doer/object/result/place (^$(explore)$^): a pm#thing,
          may have for pm#experiencer: a #person,
          may have for pm#recipient: a #person,
          may have for pm#relation_from_situation (^$(explore)$^): a pm#thing,
          may have for pm#url: a pm#URL]
];