reactivity can be used to observe distant 78
reactivity is not susceptibility. owl_datatype_property is irreflexive_binary_predicate. owl_datatype_property is not predicate. retreat is not signal. reflectivity is not visible_feature. owl_property is not binary_predicate. positioning_uav_for_observation is not controlling_event. reflectivity is visible_feature. owl_datatype_property is predicate. positioning_uav_for_observation is controlling_event.