(=>
(and
(equal ?PLANE
(LevelPlaneFn ?P ?A))
(part ?P ?R)
(instance ?R Region)
(located ?R ?A))
(exists (?L)
(and
(instance ?L LineInSpace)
(endPointsOfLineInSpace ?P
(CenterOfPlanetFn ?A) ?L)
(orientation ?PLANE ?L RightAngle)))) |
Mid-level-ontology.kif 28070-28082 |
If equal X, the PlaneInSpace is perpendicular to the line formed by Y, and the centre of the AstronomicalBody., Y is a part of Z, Z is an instance of region, and Z is located at W, then there exists V such that V is an instance of line in space, Y, the centre of AstronomicalBody W is are end points of V, and X is at a right angle to to V |