Old plausible upper bound element
HS-I IS something, IN AR, VISIBLE E
New plausible upper bound element
HS-I IS something, IN AR, VISIBLE E DISTANCE-TO-ENGAGEMENT-AREA close
Old plausible lower bound element
HS-I IS hill-sector-868-1, IN AR, VISIBLE E
New plausible lower bound element
HS-I IS hill-sector-868-1, IN AR, VISIBLE E, DISTANCE-TO-ENGAGEMENT-AREA close
Addition of new knowledge in the Semantic Network
hill-sector-878-2 DISTANCE-TO-ENGAGEMENT-AREA far hill-sector-868-1 DISTANCE-TO-ENGAGEMENT-AREA close